They have retired the eBay bucks as of April 1st 2021. You can still earn eBay bucks but....only through special promotions/offers they send to you through eBay messaging.
Go to your eBay bucks, click FAQ and the title "earning eBay Bucks" and you will see the explanation. in part, something like this,
After careful and thorough consideration, we decided to retire the 1% earning as we look to continuously optimize our offerings. The good news is that we will continue to offer limited time eBay Bucks Bonus promotions for earning eBay Bucks. In addition, all Bucks earned on or after April 1 , 2021 but the Bonus offers will now be valid for 12 months.
