Then would it be fine to create 2 MRs at the same time? I was a little biased towards 1 MR 2 Commits because of the wiki stating that multiple outstanding MRs from an individual are discouraged.
The same principle applies to one MR encompassing multiple functionalities.
The rule isn't clear cut, and is intended to discourage overflowing reviewer resources by e.g., making the same mistake across multuple MRs. If your MRs have distinct maintainers, and you get their approval, then you should be fine.