Can Display Entities Naturally Generate as if They’re Blocks?

I’ve been adding some custom blocks to the game using a trick with item displays. Everything I need them to do has been figured out as far as I know, except for having them generate naturally during world creation.
I have no good experience with worldgen packs whatsoever. I’ve messed with jigsaw structures and that’s it. I want to naturally generate some “blocks” in the same way that features are placed. For one, I’d like to have a custom plant block to generate in a “random patch” formation like flowers or lily pads do. Thought about using command blocks that summon the entities, but those files don’t support additional info like the commands being run.