can’t we change buyer feedback any more ?
You can ask the seller to make a request through the resolution centre on the order page for you to change your feedback, but can’t change it directly yourself any more. (This assumes you’re the buyer!)
In addition to what @offlinehelpers mentioned, that option is only available for 3 days after the delivery (before the order is marked as complete) .
As how? I don’t understand.
You can not if the order is completed.
You can always resolve the issues and ask the buyer to change the feedback if he is satisfied.