On 30 June 2021, I went to the International Institute of Social History in Amsterdam.

They have a big collection of punk fanzines from many countries.

The list on that page is not complete. Eg, Pin is not on it. Though it is present at the IISH. See here.
An IISH lady told me that anyone is free to make scans of their punk fanzines and put them on the internet, eg at bacteria.nl.

So, someone with a USB flash drive, and a list of fanzines already present at bacteria.nl to prevent superfluous work, might do good work at the IISH to make more punk zines accessible to everyone.