Hey guys, I bought this laptop recently and I've also been facing this issue. I admit I am not very knowledgeable when it comes to this kind of stuff, so I just did some research and I believe I have found a solution that works, at least for my case. I have not tried any other solution proposed in this topic, so you can maybe see this as an alternative solution. I just followed animakozak's post on this thread:
https://community.amd.com/thread/244625
He basically did the following:
Nvidia drivers,
installed all the missing Asus software, including Armory Crate,
updated BIOS to 208,
chipset drivers (at this point it got a bit better),
enabled V-sync,
set in power management 99% CPU min/max usage
and forced Nvidia card to be used with application.
He's not sure which one did the trick (neither am I, the only thing I did not do was updating my BIOS), but it seems to have worked for me so far. The frame drops I had while playing The Outer Worlds were extremely annoying, but this seems to have fixed it. I suggest looking at animakozak's post over on the above link.
Edit: Ok, turns out this fix is not perfect at all, I still get frame drops from time to time. But it's a lot better than before.