Using /locatebiome command on a pre1.18 world teleports you to biomes that would've been there if the seed was generated in 1.18. In example screenshots that I provied, you can see I tried to locate wooded_badlands biome, but it teleported me to a plains biome. This plains biome was generated in 1.16. However on a fresh new world with the same seed wooded_badlands is in the exact same place the game thought it was on that 1.16 world.