Here’s a quote from a generally good Lemmy howto

To mitigate spam bots, most lemmy instances require new user accounts to be explicitly approved. This may take a few minutes or a few hours. In the meantime, go for a walk, read through the official Lemmy documentation, or browse through all the available Lemmy Subreddits Communities while you wait.

Could you include what you’re currently using for the various reflector command-line switches? (e.g. --age --protocol --sort …)