Hello,
Did you tried to force the discrete GPU by disabling the APU gpu in the device manager, if possible?
Is there some options in the bios laptop to force the discrete GPU over the APU GPU.
Not sure this would work but it worth the try.
I can understand the frustration, but unfortunately this kind of issues happens sometimes since they rely on software switching i suppose, where it need an updated software to work as it should.
Did you spend some time updating everything you could, bios, APU drivers, discrete GPU drivers if not included in the APU package, etc.
Also from a similar thread on reddit: "EDIT: SOLUTION FOUND! All I had to do is go to the BIOS, and under Configuration I set the Graphic Adapter from UMA to Discrete. That did the trick!"
Hope it will solve your issue, hope it help!