Ah, no. There’s no edit feature on the reviews I’m afraid. But there’s also no formatting options on the site reviews either, so you could never have had proper bullet points in there anyway 
(or bold, italics, etc).
Though one of the nice things about sharing them in the forum My Review topic (apart from being able to actually link to them and share them in forum conversations) is that you get to add swish formatting and links to your other reviews, etc. 