I have been running rank math for over 2 years now on over a dozen sites, and I am paying for the Business edition.
During those 2+ years, I have had endless problems with Rakmath constantly reporting incorrect rankings and the analytics just being plain wrong or not working at all and reporting ZERO for everything because it keeps losing the connection to Google and constantly needs to be reconnected or because rank math just breakds and all the data needs to be reindexed and the database repaired.
The rankings usually won't even match what the Google search console says, even though support say this is where they get the data from.
I also use other tools to monitor the rankings, and these also report very differently to rank math,
Sites will have multiple top-ranking keywords, but Rankmath will say they have none.
Obviousy its not good when your clients are getting the monthly report which incorrectly says their rankings and traffic suck, when they don't
I have exchanged dozens and dozens of tickets with Rankmath support over the last 2+ years and have got nowhere, just going round and round in circles.
The support/customer service is pretty bad, and they have on multiple occasions just tried to refund me and get rid of me because they don't care and cannot be bothered to try and solve the issues.
If you use rankmath to monitor or track your analytics/keywords/ranking, then I highly suggest you verify that data elsewhere to see if it is actually correct.