Brand New Pixel 9 Pro Notification issues

Hello,
I am facing issues receiving notifications on my less than a week old Pixel 9 Pro. What's weird is that some apps are completely fine (Whatsapp, Gmail, etc.) while others I receive 0 notifications from (Discord and Snapchat are the ones I am aware of as of now).
Any help would be appreciated.
For context: I migrated my data from an iPhone. not sure if that info is helpful but hey.