Here is my I-751 timeline
03/08 - Package sent to Phoenix Lockbox
03/10 - Package delivered
03/16 - Personal Check Cashed
03/20 - Received "Biometric reuse notice" and "Online account access notice" in the mail
Case history (In USCIS case tracker) :
March 10, 2023: We received your Form I-751, Petition to Remove Conditions on Residence, and sent you a receipt notice
March 17, 2023: Case Is Being Actively Reviewed By USCIS
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Service Center is Potomac Service Center which has the longest wait time. 26.5 months