You might try to resolve this issue by setting the "min_engine_version" in the manifest .json file to [1, 20, 30]. you might experience some issues with items and blocks when applying the change so if it breaks some things, you can try to make the structures a separate behaviour pack. I hope this helps.
I give credit to 'LieutSavg99' on PMC for helping me resolve this issue
You might try to resolve this issue by setting the "min_engine_version" in the manifest .json file to [1, 20, 30]. you might experience some issues with items and blocks when applying the change so if it breaks some things, you can try to make the structures a separate behaviour pack. I hope this helps.
I give credit to 'LieutSavg99' on PMC for helping me resolve this issue