Hello,
Thank you for contacting Rank Math, and sorry for any inconvenience caused.
I checked your website with our External SEO Analyzer, I could see that 42 images are missing the ALT tags, these images seem to be the resized version of actual images. Please check your media section if all the images have the ALT tags and if your caching or image compression plugin or CDN provider is creating these images.
I hope this helps. Looking forward to helping you.
Can confirm that every image has an alt tag
I have disabled imagify which was compressing images
i have purged cache and disabled wprocket which was caching them
I purged cache from my host wpengine. They are the CDN provider as well.
Hello,
I checked your website with External SEO Analyzer, the missing ALT error is not reported now:

Please clear the SEO Analysis cache at Rank Math > Status & Tools > Database Tools > Clear SEO Analysis

Once done, clear your website and browser cache and re-run the SEO Analysis.
If the SEO Analysis is not updated, we might need to take a closer look at the settings. Please edit the first post on this ticket and include your WordPress & FTP logins in the designated Sensitive Data section.

It is completely secure and only our support staff has access to that section. If you want, you can use the below plugin to generate a temporary login URL to your website and share that with us instead:
https://wordpress.org/plugins/temporary-login-without-password/
You can use the above plugin in conjunction with the WP Security Audit Log to monitor what changes our staff might make on your website (if any):
https://wordpress.org/plugins/wp-security-audit-log/
We really look 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.