I have Photoshop but prefer not to use it. What I can do with Serif Photo Plus i have not been able to find out how to do with Photoshop. Perhaps it's because of what you are used to using. Don't really know, Photoshop frustrates me and life is too short to waste time trying to figure it out.
To answer your question though.
I'm running Photoshop and/or Serif Photo Plus on a Ryzen 5 5600 on an MSI X570 Gaming with 48GB of Gskill 3200 RAM, a Radeon RX 480 GPU, 1TB XPG Gamix S70 NVMe 4 x 4, 2TB WD HDD, 512 Kingston Fury SSD, Windows 11 Pro. I have no problems doing detailed graphics. Your GPU should be sufficient to handle it. If your getting lags and stuttering I would suggest a dedicated GPU.
If it ain't broke; don't fix it!