I cannot put into words how profoundly stupid this “feature” is. AOL and Geocities pages were genuinely more user friendly. Whoever added it, refreshed the page and said “yeah, this works well” and left it in should be fired! …out of a cannon and into the Sun!
You should be able to do it pretty easily. There are docker images for ARM64 in Lemmy docker repository so you can run it on pi4. If you have older pi, you’ll probably have to build it from source though.