I noticed this issue with my wishlist and reported it to support back in March (ticket #1000944). I went through every single item on my wishlist and at the time noted that it affected 20 items. The discrepancy was all over the place: Cyberpunk 2077 had a higher rating than in the store, some had a lower rating, some ratings were missing, some had ratings but "awaiting more ratings" or "be the first to rate" on the store page. So it doesn't look intentional.
Support passed on the information to the relevant team. Nothing was fixed. I haven't even read my last two support replies. I just went to check if the issues were fixed and they weren't, once again. No point in reading how maybe the information was passed on when no one ever fixes anything.
To date, the only time anything was actually resolved is when I reported a corrupt screenshot image and it was eventually deleted, and even that took months. I encountered more corrupt screenshot images since then (
example), but I haven't bothered reporting them.