Hello,
Thank you for contacting Rank Math and bringing your concern to our attention. I’m sorry for any inconvenience this issue may have caused you.
From your screenshot, it seems that the CPTs don’t include support for the editor, and when that happens, our plugin can’t update the preview correctly.
If you want to enable the preview, you may also need to add editor support for all your CPTs.
If you’re using the CPT UI plugin, then you can enable this option to support the editor and fix the missing description

Hope that helps.
Thank you.
Sorry, really don’t understand where is this settings https://prnt.sc/0Ed2V4mPHMHt.
Could you help?
Hello,
Thank you for your patience.
The settings in the screenshot above are from the CPT UI plugin.
Could you please confirm how did you add the custom post type on your site?
Looking forward to helping you.
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.