Meta can be unpredictable, and unfortunately, there’s no direct contact for updates.
However, here are some steps you can take to improve your chances of getting a response:
Check your spam/junk folder
Very rarely that Facebook emails get to spam/junk, but it's worth checking.
Reapplying
Reapplying once or twice is worth a shot too. Don't reapply too many times as Facebook has advised against, it minimises your chances of the application being approved.
Getting Facebook verified
Getting Facebook verified means you will get a ticket support inbox where you can raise tickets and ask for updates, this comes at a monthly cost but is worth it if you have been waiting more than 3 weeks.
If you are not verified, you will not be able to raise tickets with them.
Check your support inbox here.