I'm not sure why but the framerate I'm getting on this fairly new laptop is pretty abysmal. I have an older save (the one I bought up the 4-digit issue which seems to be good now, thanks!), which I can use for testing.

Maximum Details (1920x1080):
~90FPS - Integrated GPU on Star Map screen.
~25FPS - Integrated GPU on Planet screen.

Fair enough, the iGPU (Vega 8 integrated into the Ryzen R9 5900HX) isn't a dedicated graphics card, so that isn't too bad. However it gets pretty odd when using the dedicated GPU:

Maximum Details (1920x1080):
~28FPS - Dedicated GPU on Star Map screen.
~52FPS - Dedicated GPU on Planet screen.

This is the Dedicated RX 6800M GPU w/12GB RAM (basically identical to the desktop Radeon RX 6700XT, which is ~ Geforce RTX 3060 level). The Map screen runs slower than the integrated graphics, and the planet screen while faster than the iGPU isn't particularly good; I get better frame rates running maximum graphics settings on Horizon Zero Dawn at an even higher resolution (2560x1440).

Medium settings (1920x1080):
~90FPS - Integrated GPU on Star Map screen.
~50FPS - Integrated GPU on Planet screen.

Switching to medium boosts the iGPU performance on the planet screen tremendously. For this particular iGPU, it isn't great performance, but it doesn't seem too bad.

Medium settings (1920x1080):
~28FPS - Dedicated GPU on Star Map screen.
~70FPS - Dedicated GPU on Planet screen.

This is a bit strange as there is very little gain on the dedicated GPU when switching to Medium settings; so as a result the integrated graphics is nearly as good as the dedicated graphics here.

Low settings (1920x1080):
~118FPS - Integrated GPU on Star Map screen.
~90FPS - Integrated GPU on Planet screen.

Further gains for the humble integrated graphics; might even be able to run at 60FPS+ at QHD resolutions with this setting.

Low settings (1920x1080):
~160FPS - Dedicated GPU on Map screen.
~120FPS - Dedicated GPU on Planet screen.

Seems whatever was causing the super slow star map screen framerate disappears at the low settings while using the dedicated GPU. Planet screen framerate is better, but it isn't that much better than the integrated graphics.

Just a small update.

Moving from AMD's 22.3.2 Drivers to 22.5.2 Drivers fixed the weird low fps in the map screen. I've tweaked performance a bit on the machine as well, so that explains some of the smaller differences rather than the driver change):

Maximum Details (1920x1080):
~78FPS (previously 90FPS not sure why this dropped) - Integrated GPU on Star Map screen.
~30FPS - Integrated GPU on Planet screen.

Maximum Details (1920x1080):
~103FPS (previously 28FPS) - Dedicated GPU on Star Map screen.
~54FPS - Dedicated GPU on Planet screen.

Still considering the power of the RX6800M the frame rate on the planetary screen still seems pretty abysmal ~54FPS for FHD resolution.

It's the game not your fault of the GPU... They skipped a few steps, like testing and there are definitely gaps but it is a good game imo