Summary:
When you type /locate biome there are biomes in the list that have been removed or are not in use. They cannot be generated naturally, nor are they available in the Java version.

• Badlands Plateau - mesa_plateau
• Bamboo Jungle Hills - bamboo_jungle_hills
• Birch Forest Hills - birch_forest_hills
• Dark Forest Hills - roofed_forest_mutated
• Desert Hills - desert_hills
• Desert Lakes - desert_mutated
• Giant Spruce Taiga Hills - redwood_taiga_hills_mutated
• Giant Tree Taiga Hills - mega_taiga_hills
• Gravelly Mountains+ - extreme_hills_plus_trees_mutated
• Jungle Hills - jungle_hills
• Modified Badlands Plateau - mesa_plateau_mutated
• Modified Jungle - jungle_mutated
• Modified Jungle Edge - jungle_edge_mutated
• Modified Wooded Badlands Plateau - mesa_plateau_stone_mutated
• Mountain Edge - extreme_hills_edge
• Mushroom Field Shore - mushroom_island_shore
• Shattered Savanna Plateau - savanna_plateau_mutated
• Snowy Mountains - ice_mountains
• Snowy Taiga Hills - cold_taiga_hills
• Snowy Taiga Mountains - cold_taiga_mutated
• Swamp Hills - swampland_mutated
• Taiga Hills - taiga_hills
• Taiga Mountains - taiga_mutated
• Tall Birch Hills - birch_forest_hills_mutated
• Wooded Hills - forest_hills
• Legacy Frozen Ocean - legacy_frozen_ocean

Steps to reproduce:

1. Be in the Overworld.
2. Enter a command to search for one of the above biomes.

Observed results:
Command didn't find the biome.

Expected results:
These biomes will not be in the list of biomes (when you type /locate biome) as they are not generated.