I said it MAY be a problem for the GT-Mini-A in this topic i have replied to.
I don’t have any Beelink devices and not sure any CE Devs have a GT-Mini-A
You can ask that question in the official supported devices topic.
Be aware that by flashing to internal and bricking your device will be your problem when it comes to maybe claiming a warranty from an ANDROID BOX
Read here as well.