There’s no immense proof Palpatine is behind this feat, though it does seem such a big ship would need more than its own power to be upended from a position below ground.
If this bad boy got Force pulled out from beneath the dirt, it’d have to be someone with an immense connection to the Force.
Palpatine fits the bill and could probably chuck that thing at that giant Resistance squadron to do some major damage That said, there looks to be some lights on in the ship, which may indicate this thing is manned.