My Minecraft world seed terrain no longer matches the terrain my world is accustomed too

when the 1.18 update came out the world type option large biomes was removed from bedrock edition and due to that all players main survival worlds seeds got overwritten if they had changed the world type to large biomes before they removed it so now whenever I load up a new world with my original survival world seed the terrain that is accustomed to my world is completely different including when I look up my seed on chunk base website the seed is the same in my survival world but the visual of the terrain on chunkbase is completely different which makes it impossible to find structures in my survival worlds anymore because the game thinks the seed terrain I’m used too doesn’t exist anymore I would like to know when large biomes will be added back and this bug will be fixed because I am a YouTuber and not being able to find certain biomes and structures make it much incredibly difficult for me to make new up coming 1.20 videos on my YouTube channel with my 7 year old survival world my original pawn point was on a extreme hills biome that had a badlands biome within a short couple blocks walking period and now the world terrain on chunkbase shows spawn point as a snowy Tiga  biome my world seed is -809115152