I have a Dell G15 5520 as my daily driver. It’s a 12th gen intel core i5-12500H with nvidia RTX 3050. I never even let it boot Windows. Booted straight off an Ubuntu USB and wiped the drive. Aside from some quibbles with Ubuntu itself (I hate that by default Firefox is a snap from the snap store), everything basically worked out of the box. The only real hurdle to jump is enabling the proprietary nvidia driver.
Dell has at times offered their laptops with Linux preinstalled. I’m not certain they have a current offering, but just about all of their models are well supported.