I just bought an Epiphone SG G400 Gothic
ive been very impressed with this guitar and bought it as a cheap second guitar
the only problem is, the little silver stickers on the volume and tone knobs have fallen off
am i ok to just glue them back on?
or whats the best stuff to use to reattach them??

i was considering buying some different knobs as i dislike the style of the SG ones...
Are all knobs standard fit?

These are pretty insignificant questions tbh
but any help is appreciated
Super glue will work fine. Your pots are most likely split shaft coarse splines, very common and loads of knobs to choose from.
don't go overboard with the crazy glue. It can turn clear plastic cloudy from the fumes. a little drop in the center should be plenty