Gaming notifications not coming through.

I used to get notifications from two gaming apps I have when I first got this phone (Galaxy A54), but I've suddenly stopped receiving them out of the blue without me doing anything. I can still receive notifications from any other app, just not from these two gaming apps.

• Do not Disturb is off.
• I have them on Unrestricted.
• I've turned Power Saving Mode off.
• I've cleared cache.
• Notifications are both enabled in-game and on Settings.
• I've turned off "Remove permissions if apps is unused".
• I've restarted my phone.

But nothing's really worked. I haven't done an uninstall and reinstall since I didn't want to risk losing my data.