The AMD rx 9060 xt 16gb GPU looks good.
Then choose whether you want DDR4 or DDR5 RAM, and based on that pick choose a modern Ryzen CPU. For a CPU cooler, I recommend something by Arctic. For example, I got the Arctic Freezer 34 eSports DUO used (because used is basically as good as new but way cheaper).
For motherboard company, I would avoid ASUS because of the recent security vulnerabilities. Maybe try ASRock, as they are budget friendly and aren't lacking. Really anything is fine as long as your CPU fits the slot (and so already should your RAM if you choose a CPU compatible with the right version).
Get an NVME SSD with at least 1 TB of spacs and a HDD for extra, slower storage. You can find some good deals on here: https://diskprices.com/
Get a case that can fit your graphics card and CPU cooler. Also should have space in the front and back to channel wires
Use an online power supply calculator to figure what wattage of PSU you need for your parts. You should get a PSU that is Gold or Platinum rated and prefer ably modular wires.
Even after using PopOS I dont understand the hype. It is Ubuntu-based, meaning that its packages are stale and often quite out of date, which isn't something I would recommend for a gaming distro.
Better to pick one of the following, which are gaming focused, user friendly, and have up-to-date packages for {Mesa, Vulkan, Wine, Kernel, etc}:
Edit: My reason for saying that up-to-date packages are paramount is because a newer kernel supports more features, better performance, new hardware support, less bugs, and the same is true for packages that effect gaming. Desktop environments get better quickly through updates and bug fixes that effect gaming may take a year of more to reach pepetually out of date distros like Ubuntu. It is generally quite important, but less important if you use Steam Flatpak because it is slightly sandboxes.