Im currently playing the All in One Modpack (1.16.5) and installed 2 Babee Upgrades in a Hive with 3 Prosperity Bees. After 2 Hours of continuous production of Honey and emptying the hive no baby has spawned so far.

Bees that can't breed do not work with the babee upgrade.

Maybe this could be added as info in the book, or on the upgrade? I thought this upgrade was supposed to be used to breed bees that cant be manually bred.

it's meant to automate breeding