My graphic card is not detected by the game

maliaast​  The unrecognized video card isn't a problem, in that it's not causing the game to run poorly and there's no benefit to fixing it.  However, the game would run worse if it's not using your RTX 4070 at all.  Have you confirmed in Config.log that the 4070 is in use?  If you see the Intel Arc GPU instead, let me know.

There's no obvious problem in your dxdiag that would explain why the game isn't running well either.  Do you play with the laptop plugged in?  If not, try that and let me know whether it helps.

If that's not the issue, please start a new save, with no mods or custom content present (remove your Mods folder entirely if you use mods or cc), and see how it runs.