What are the chances of getting a line64 mini arm based computer similar to Apple mini with a arm linux distro for a OS?
Assuming you mean Apple's Mac Mini line, you can pretty much already have this by getting a RockPro64 and one of those little aluminum cases for it. If you're after something with more storage options, there's the NAS case too. Both are small-footprint housings for a computer with easily enough power to be a Linux desktop.
The RockPro64 uses the exact same SoC as the PineBook Pro. So anything that runs there, can also run on the RockPro64.
I am writing this right now from my PinebookPro, and can attest that while not super fast, it is usable as a low power laptop including watching Youtube etc.