I'll add myself to this. I-751 has been pending since 9/14/2021, with fingerprints applied on 10/28/2021. No updates on that since, LIN processing center.
For my N400:
- Filed: 9/13/2022, received biometric reuse notice that same day.
- Interview notice: 12/23/2022
- Interview: 2/8/2023
No decision could be made because A-file was not transferred over. It's been 30 days, and no movement yet on my I-751 either.