Currently working on a 1.16.5 modpack that adds this alongside a lot of dungeon mods, which means theres a lot of spawners.

I like spirit orbs but i'd also like to be able to configure how many drop from spawner/the rate at which they drop, so that heart containers feel more earned.

You can use datapack to disable or modify drop rate of Spirit Orbs for spawners, since it is implemented with loot modifiers.

No idea how to use those, oh well :/

I've spent the past two days trying to figure out how to make a datapack that would fix the problem, scoured youtube and google, asked on reddit and in discords, but I haven't been able to get anything more than what appears to be a loot table for mobdrops - any advice on where to look?