Approach it from a design perspective

[1peter10]

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If i may, and speaking from a strict information design perspective (and also a bit of design-design perspective) there is WAY too much text. It is a common mistake of trying to fit "everything" on a flyer, while in reality you should stick to the essential.
1/ the main text could be reduced by half.
2/ the many long lists could be summarized. also people do not type URLs from a piece of paper...
my suggestion for 2/
for each block, maybe make a short list with keywords ppl can search for ("many android devices supported by PostmarketOS, pine64, purism, etc. " = 1 line of text) + 1 QR code linking to a page with the detailed list, and the links, clickable. (or just the keywords)
something more readable is more likely to be taken from the pile, and read in the first place. it is also much more impactful...