Hello,
Thank you for contacting the support and sorry for any inconvenience that might have been caused due to that.
RankMath is multi-site ready so you can network activate it and enjoy all benefits. I would advise adding the Local Schema to each subsite.
Hope that helps.
Hello,
Since we did not hear back from you for 15 days, we are assuming that you found the solution. We are closing this support ticket.
If you still need assistance or any other help, please feel free to open a new support ticket, and we will be more than happy to assist.
Thank you.