VA/DC FO June concurrent I 130 and I 485 Filers


Anybody here who filed in June 2019 or sometime around from VA/DC?

We filed I 130 and I 485 together in June 2019. Both applications went to NBC.
Receipt no starts from MSC.
Received RFE in August on I 485
Submitted documents by september
Status changed to ready for an interview on 27Jan2020 on I 485

No response on I 130 since june.

What does this mean?
Trying to understand how long will it take to get an interview at DC field office…