Dear feelpro_exports,
Greetings from team eBay!
We have made all listings mobile friendly automatically, regardless of how they were listed (mobile or computer).
If the description has embedded images, the tool will warn sellers if the embedded images have defined fixed widths that are not mobile friendly. If your description does not have embedded images, you won’t need to use the Mobile Friendly Checker.
For more details you can visit the announcement here : https://community.ebay.com/t5/Announcements/All-Listings-Are-Now-Mobile-Friendly-by-Default/ba-p/299...
If the issue still persists then please connect with the eBay customer support team: https://www.ebay.com/help/home
Regards,
eBay INCBT Team