I see the seller's %:

 

countessalmirena_0-1676532770449.png

 

(I've edited out the sellers' actual names and my postcode, but the rest is exactly as shown in a search result.)

Those who don't see the seller's % may need to customise their view.

 

Click on the drop down to the right of where is says "best match", "newly listed" etc, then choose "customise".

 

One of the options to show is seller information, which I assume includes their feedback percentage.