More possible mobs due to breeding

[pliant whale]

I would like to make it so that after armadillos are bred, they can give birth to other mobs besides armadillos. for example sometimes a armadillo would be born and sometimes a new mob

[cunning oak]

maybe try scripting? if event is any entity event you can listen to it with scripting and manually summon the entity

[quick seal]

Alternatively, in minecraft:entity_born, you can use a randomize function to add a component group which uses minecraft:transformation to turn it into the other mob