Hello,
Thanks for contacting us and sorry for any inconvenience that might have been caused due to that.
I checked your post on Facebook Sharing Debugger and the featured image of your post is being displayed in the link preview:

Please clear the cache of your site & browser and try again. Let us know if the issue persists.
We really look forward to helping you.
That seemed to work thanks!
Hello,
We are super happy that this resolved your issue. If you have any other questions in the future, know that we are here to help you.
If you don’t mind me asking, could you please leave us a review (if you haven’t already) on https://wordpress.org/support/plugin/seo-by-rank-math/reviews/#new-post about your overall experience with Rank Math? We appreciate your time and patience.
If you do have another question in the future, please feel free to create a new forum topic, and it will be our pleasure to assist you again.
Thank you.