I’ve got a last gen ROG Strix G15 from box.co.uk that was £999.99
It has a Ryzen 9 (5900 maybe?) CPU, Radeon 6800m GPU, a 1440p 165Hz display and it plays anything I’ve thrown at it so far, including Cyberpunk, Elite Dangerous, Forza 5, Baldur’s Gate 3, Helldivers 2, etc. all at more than acceptable frame rates. So it can be done.
It definitely needs plugging into the mains when gaming, battery lasts about 15 minutes otherwise. I’ve also heard that plugging into an external monitor can give better performance than using the laptop display but I’ve not tried that.