This is due to the portrait screen on the 7840u model, vs the native landscape screen on the 8840u model. This issue is easy to workaround by changing the relevant kernel arg for orientation. GPD Win Max 2 The WM2 is mostly usable with Linux, but does have some bugs standard stuff ...
While details regarding the price and availability of the new WIN Max 2 model have not been released, it is expected to be priced slightly higher than the current R7 7840U model, which is priced at $1,370.
Applies to the Win 4 6800u, 7840u, 8840u, and apparently also works on the Win Mini (confirmation required for Win Mini) based on this patch that had previously shipped with Bazzite:https://github.com/ublue-os/bazzite/commit/04929200614a16c16d22854924a42f42561049d8 ...