I loved my Pulse 15 (Gen 1) from Tuxedo

It was a performance monster and still had amazing battery life.
But as others have said, they only take some finished Clevo models - like most small distributors, who can't afford their own factory.

But they verify that everything runs with Linux, else they sometimes patch stuff.

And I need to highlight their support!
After years with my Pulse 15 the battery became a pillow, because I used a USB C charger that wasn't working right (always switched on and off, which killed the battery)
Pretty much without questions asked I got a new battery for free.

Now I have it to my nephew, who enjoys Minecraft on this laptop (still Linux), but the CMOS battery was dead.
Got that one for free as well after warranty

So, I can't really complain about them.
Actually the opposite.

But I still settled for a Framework 16, because I wanted something different and the models at that time weren't fitting my use case...