1080p on Doom Eternal on High settings 68 FPS
Medium setting 84 FPS.
It wont be exactly that, it was tested on a very simular spec laptop so wont be far off.
So yes even on Ultra settings it would run that game ok, just turn the shadow quality and water reflection to low and everything else on highest and it would run well i think.
Harder to run games will be more of a challenge and you will need to mess about with settings, turning them lower until it runs well.
It will run older games well
The storage is fast but low amount at 256GB ( you could use external storage though by either making your own with a hard drive / SSD drive and USB 3 external hard drive caddy or buy a pre made one )