If you are invited to a Shared Album, there should be a notification for that, but sometimes not receiving a shared album invite will occur due to the following reasons: iCloud Photos and Shared Albums are not turned on. Poor Wi-Fi or cellular data. You should connect to a good network to allow iCloud to send or receive invitations. Software glitches. A glitch or software issue may result in a shared album invite not showing up. There may be something wrong with the Apple server.