Once I downloaded the 1.11 Village and Pillage Update, the Achievements weren’t showing
up on my Phone, but on the Windows 10 edition the Achievements showed up. BUT: the Windows 10 edition is on the same account as on my phone, So they are bound to the same account, maybe so I don’t have to do the Achievements twice. So far the Achievements always showed up on both devices. And both devices were bound to the same Account.
No, the achievements are separate. Achievements from a platform won't roam to another.