When you view the site on mobile (or on the desktop by making the window super narrow), as far as I can tell, you can't easily access your notifications.

There will be a big circled number over the hamburger menu, but tapping that menu doesn't give you any obvious way to view the notifications, and you can't even tap into "Account" under that menu -- the "Notifications" menu options that appears in your profile picture dropdown on the desktop site is missing from the account menu on the mobile layout.