Their website provides good enough information I believe:
- They only mention production in Germany. Their "Why Tuxedo" page[1] does seem to imply that they are building most of it themselves.
- They mention TuxedoOS for the same reason System76 mentions Pop_OS!: because they made it. I would expect it to work with any one of the OS included in their WebFAI[2] pretty well[3], which by the way I believe is actually sent with the laptop.
- Their FAQ might shed some light here[4] depending on where you live. It's pretty much the same with any brand I know; maybe you have had a different experience?
I find it misleading that they do not mention it, then. Something like "Our Clevo-based laptops are assembled by us [...]" would suffice. Laptops with Linux[1] does it, why not them?
- Who is actually producing these? Are they resellers? For whom?
- They mention TuxedoOS. Why? Can you have the same experience with a vanilla Debian or Arch?
- Customs costs. They may inflate the price quite a lot depending on where you are