This. I searched a bit for "1.21 terralith + tectonic seeds" and ended up with -5757465302180938436 from this post https://www.9minecraft.net/top-5-best-minecraft-seeds-for-terralith-and-tectonic-java-bedrock-edition-1-20/
Anyhow, I used locatebiome in a 20k block radius and wasnt able to find any volcanic craters. Installed nature compass and it didnt find in a 250k block radius. Wtf?? 'Rare' biomes like mooshroom islands are at most 12k blocks from spawn.
by LegendaryCraft64