I believe the platform power profiles are standard nowadays and coded in the bios, so Linux should have access to them just like Windows does. You can use the powerprofilesctl command to list and change power profiles. Gnome also has a Power Mode switcher on the top menu, it’s the same thing.
performance: Power limits to max; Aggressive fan curve with speed limit to max. Generally loud fans. I need this to play demanding games in the summer.
balanced: Power limits to max; Moderate fan curve with a medium limit. Great perf (under sane ambient temp), while not too loud.
power-saver: Lowered power limits; Quiet fans.
Those seem to correlate exactly with the power profiles in Armoury Crate: Turbo, Balanced and Silent respectively. I don’t think there’s any performance being left on the table.
Gaming laptops with AMD CPU + AMD dGPU are a great suit for Linux gaming.
Also, AMD GPUs benefit a lot from undervolting, which is safe to do. It’s free performance. I’ve made a simple systemd service to keep the undervolt always active: https://codeberg.org/jntesteves/amdgpu-tune