I feel like ancient debris should be added to the nether generator
It comes from the nether, so it wouldnt be like why is this here
Another reason is that because its so expensive that it would make it easier for players
you could set it to a super low chance at like 0.5% or something or make it an upgrade for generators so players have to work for it
This suggestion is very much possible, Ill add it to my list to see if we can do something like that in the near future.
Thank you for taking the time to provide this suggestion