This is great news!

Mint is my choice of weapon when it comes to desktop Linux and I have been eyeing the Framework 13 for quite some time now.

I used Linux Mint Cinnamon on my Framework 13 using the 11th gen Intel and just recently upgraded it to the Ryzen 7840U. It works very well with both. For a nicer display scaling experience I recommend the 2880x1920 display.
Wjy the 13 over the 15? i have been considering the 16
I bought it with the 11th gen board before the 16 existed but now they have me completely hooked on the ultralight super compact system. Hooked to the point that I’ll sacrifice graphics settings to play games on it, which works surprisingly well IMO.