Definitely cutting it a bit fine this time; during the last level 4 lockdown (March - April 2020) - when production was also suspended - the show was trimmed down to three episodes a week. The other Auckland lockdowns (August 2020, February 2020 and March 2020) were all only Level three so production was able to continue.
Just posted on the Bravo ratings twitter regarding Sunday night
#RHOP S06E12 - 0.996 million viewers (0.30 18-49 demo)
#RHOSLC S02E03 - 0.613 million viewers (0.19 18-49 demo)
38% of the audience for Potomac doesn't watch Salt Lake City, that is very unexpected.