If you click your username at top right corner and then the bell (which will have a number if there are notifications) you can find out what happened with those requests
Hmm if you'd submitted them in past it's strange to see 0 count. I see all of mine there. https://sfpl.bibliocommons.com/user_profile/me/notification_... shows:
> Your suggestion has been approved!
The library will acquire the following Book: <title>. To learn more and manage your requests, go to Suggested Purchases.