So...why aren't my villagers breeding?

MC Bedrock btw

There's beds. I've given them food. Both of them are Fletchers. Idk if that's an issue. Is it maybe the fact they're underground? Not sure.

Can anyone help? I wanna surprise my friend with a full villager trader system. Thanks!

MC Bedrock btw

There's beds. I've given them food. Both of them are Fletchers. Idk if that's an issue. Is it maybe the fact they're underground? Not sure.

Can anyone help? I wanna surprise my friend with a full villager trader system. Thanks!