As there are a lot of bots registering on the forum, it might take a while before your account will be approved. It might even be deleted by accident. You can always send an e-mail to Quinten if you have not received account confirmation.
Users registering with a free email account (like 163, gmail, outlook, protonmail,...) should always contact Quinten with a short message about their ACOLITE use case to get their account activated.