As others have stated, your timeline in the first post is not clear, so probably the officer is also confused (but alas! even if they are not confused, tier 1 officers do not know much about your case).
Your last update was the biometrics.. in 2021. People have been waiting longer than that. Have you filed for N400?
If the extension letter expires, you can get an I-551 appointment. About 30 days prior to expiration, call and say "info pass". If you want to know what's the hold up, request a tier 2 officer.