Shopee allows you to post follow-up reviews, and gives you a grace period of 45 days to post reviews.
If you want compare, at least compare with facts.
I just checked and I cannot edit any old ratings. Maybe it's something you can only do through the app?
I can't install the app because I travel between countries and they block my Google account from installing the local app. I'm sure there's ways around that but I'd rather just use the website.