Hi, thanks for your response! My i751 was transferred to NBC in September 2022 and till now, nothing happened. I was told by USCIS agent that i751 in NBC processing time is 32 months. My n400 is in NBC now waiting too. That is why I am concerned that i751 is slowing down my n400. People who have applied n400 later than me already got their interview. It is so frustrating.