I’m curious about what if a seller doesn’t review the buyer as he already knows that the buyer has given a negative feedback?
Here, please read.
The negative feedback will appear after 10 days, and the seller will no longer be able to review the buyer.
Why would you avoid reviewing a seller who you feel has likely rated you poorly? The only reason to do that would be if the bad review was justified and you have no rebuttal.
Otherwise it’s a way for you to defend yourself and show other sellers what the experience was like. You can do the same in the response to the review.
By the way, please look things up before asking. Obviously Fiverr has to officially explain how these things work so you can find it if you look.