[ CONSULTA ] App missing from Notifications in Settings

[vERONIZ]

I have the iPhone X and all the recent updates.

I recently had to uninstall then reinstall an app... and now it is no longer listed under Notifications in Settings. I read somewhere else that I should Offload it and then Reinstall. I did that... and then the game wouldn't open at all. It would start to open, then immediately crash. So, eventually, I deleted and reinstalled again.

Is that the only way to get it listed there? It's the one app (other than texts) that I WANT notifications for. It's a game, and someone from game Support told me to find the game and see if Notifications are checked. I don't have that option. It just says:

ALLOW (app) TO ACCESS:

Location
Siri & Search
Cellular Data

When I opened the app for the first time after the reinstall, it didn't ask me anything about notifications.

How do I get it listed under Notifications?