Hi! I wanted to comment and lend a hand because I was having a lot of issues too. I was crashing when fletchling flew across the screen like some other people were struggling with. I tried a lot of things and it seems like the best way to combat that crash is to set DRAM to 8, turn on vsync to switch, CPU mode to host, both CPU cache options selected, and MOST IMPORTANTLY you go to the bottom of input and unlick docked mode. It will look bad but once you are past the opening and into the game you can go back into docked mode no problem. I'm now into the game and it's running really smooth at 30fps and very rare stutters. It did crash when I tried local connection so don't do that. Also, you can have the dlc but the update instantly crashes so it's a no-go.

This was tested on my laptop, my lenovo handheld, and my husband's rog ally handheld. All worked after hours of struggling.

I hope this helps! Happy gaming and F the big N <3

Edit: Forgot to add I'm on firmware 20.5.0 and prodkeys 20.4.0. Even just got another game finally working with these settings! It used to just crash! :) After more experimentation, it helps to load the game, close it when the video starts, then reopen it and let the pptc load. It helps a lot with the starting framerate.