I applied netherite armor values to trimed gold armor via these commands:

1. /give @p golden_helmet[trim={material:"minecraft:redstone",pattern:"minecraft:silence"},attribute_modifiers=[\{id:"armor",type:"armor",amount:3,operation:"add_value",slot:"head"},\{id:"armor_toughness",type:"armor_toughness",amount:3,operation:"add_value",slot:"head"},\{id:"knockback_resistance",type:"knockback_resistance",amount:1,operation:"add_value",slot:"head"},\{id:"block_interaction_range",type:"block_interaction_range",amount:1,operation:"add_value",slot:"head"},\{id:"entity_interaction_range",type:"entity_interaction_range",amount:1,operation:"add_value",slot:"head"}],custom_name='{"bold":true,"color":"#FCF400","text":"H","underlined":true},{"color":"#FCE300","text":"e"},{"color":"#FCD100","text":"l"},{"color":"#FDC000","text":"m"},{"color":"#FDAE00","text":"e"},{"color":"#FD9D00","text":"t "},{"color":"#FD8B00","text":"o"},{"color":"#FE7A00","text":"f "},{"color":"#FE6900","text":"W"},{"color":"#FE5700","text":"i"},{"color":"#FE4600","text":"s"},{"color":"#FE3400","text":"d"},{"color":"#FF2300","text":"o"},{"color":"#FF0000","text":"m"}',enchantments={levels:{"minecraft:protection":4,"minecraft:thorns":3,"minecraft:aqua_affinity":1,"minecraft:respiration":3,"minecraft:mending":1,"minecraft:unbreaking":3}},max_damage=408] 1
2. /give @p golden_leggings[trim={material:"minecraft:redstone",pattern:"minecraft:silence"},attribute_modifiers=[\{id:"armor",type:"armor",amount:6,operation:"add_value",slot:"legs"},\{id:"armor_toughness",type:"armor_toughness",amount:3,operation:"add_value",slot:"legs"},\{id:"knockback_resistance",type:"knockback_resistance",amount:1,operation:"add_value",slot:"legs"},\{id:"movement_speed",type:"movement_speed",amount:0.3,operation:"add_multiplied_base",slot:"legs"}],custom_name='{"bold":true,"color":"#FCF400","text":"L","underlined":true},{"color":"#EFF50D","text":"e"},{"color":"#E1F51B","text":"g"},{"color":"#D4F628","text":"g"},{"color":"#C7F636","text":"i"},{"color":"#BAF743","text":"n"},{"color":"#ACF751","text":"g"},{"color":"#9FF85E","text":"s "},{"color":"#92F96B","text":"o"},{"color":"#85F979","text":"f "},{"color":"#77FA86","text":"S"},{"color":"#6AFA94","text":"w"},{"color":"#5DFBA1","text":"i"},{"color":"#50FCAE","text":"f"},{"color":"#42FCBC","text":"t"},{"color":"#35FDC9","text":"n"},{"color":"#28FDD7","text":"e"},{"color":"#1BFEE4","text":"s"},{"color":"#00FFFF","text":"s"}',enchantments={levels:{"minecraft:protection":4,"minecraft:thorns":3,"minecraft:swift_sneak":3,"minecraft:mending":1,"minecraft:unbreaking":3}},max_damage=556] 1
3. /give @p golden_boots[trim={material:"minecraft:redstone",pattern:"minecraft:silence"},attribute_modifiers=[\{id:"armor",type:"armor",amount:3,operation:"add_value",slot:"feet"},\{id:"armor_toughness",type:"armor_toughness",amount:3,operation:"add_value",slot:"feet"},\{id:"knockback_resistance",type:"knockback_resistance",amount:1,operation:"add_value",slot:"feet"},\{id:"water_movement_efficiency",type:"water_movement_efficiency",amount:1.3,operation:"add_value",slot:"feet"}],enchantments={levels:{"minecraft:feather_falling":4,"minecraft:protection":4,"minecraft:thorns":3,"minecraft:soul_speed":3,"minecraft:mending":1,"minecraft:unbreaking":3}},custom_name='{"bold":true,"color":"#00FFFF","text":"B","underlined":true},{"color":"#09EFFF","text":"o"},{"color":"#11DFFF","text":"o"},{"color":"#1ACFFF","text":"t"},{"color":"#22BFFF","text":"s "},{"color":"#2BAFFF","text":"o"},{"color":"#339FFF","text":"f "},{"color":"#3C8FFF","text":"l"},{"color":"#4480FF","text":"o"},{"color":"#4D70FF","text":"s"},{"color":"#5560FF","text":"t "},{"color":"#5E50FF","text":"S"},{"color":"#6640FF","text":"o"},{"color":"#6F30FF","text":"u"},{"color":"#7720FF","text":"l"},{"color":"#8800FF","text":"s"}',max_damage=482] 1
4. /give @p elytra[attribute_modifiers=[\{id:"armor",type:"armor",amount:8,operation:"add_value",slot:"chest"},\{id:"armor_toughness",type:"armor_toughness",amount:3,operation:"add_value",slot:"chest"},\{id:"knockback_resistance",type:"knockback_resistance",amount:1,operation:"add_value",slot:"chest"},\{id:"safe_fall_distance",type:"safe_fall_distance",amount:5,operation:"add_value",slot:"chest"}],enchantments={levels:{"minecraft:thorns":3,"minecraft:mending":1,"minecraft:unbreaking":3}},custom_name='{"bold":true,"color":"#8800FF","text":"M","underlined":true},{"color":"#7900FF","text":"a"},{"color":"#6A00FF","text":"g"},{"color":"#5B00FF","text":"e "},{"color":"#4C00FF","text":"W"},{"color":"#3C00FF","text":"i"},{"color":"#2D00FF","text":"n"},{"color":"#1E00FF","text":"g"},{"color":"#0000FF","text":"s"}',unbreakable={}] 1

But the armor bar didn't show the correct amount of armor, and I took more damage when hit as I did when wearing the equivalent of netherite armor. If I put on the helmet, the armorbar shows the correct amount of armor. But Once I put on another piece of armor, the armor bar only shows the armor value of the last equipped piece. If any of the pieces is unequipped, the armor bar disappears, even if the other pieces are still equipped (screenshots).