when testing is over and the pattern releases, many people make a post about it!! like this:
(by my ribstie bestlr forever @shrimpybrimpy)
and in the post, you can tag people so that they are notified, for example you can tag me by saying “@aeryneso” (basically, you put the @ symbol, then their username)
if you don’t want to make a post like that, i would love it if you just messaged me when you release the pattern!! :D