Hello,
Thank you for contacting Rank Math today.
To use the ACF plugin with Rank math, please enable the ACF module in Rank math dashboard.
The custom fields option in Rank math titles & Meta are generally for adding option custom fields that you wish to be included in your post/page SEO analysis.
Hope that helps and please do not hesitate to let us know if you need our assistance with anything else.
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.
