How to get rid of Microsoft Rewards notifications?

My Windows 11 PC randomly pops up a notification about Microsoft Rewards. How do I get rid of this?

• I’m not logged in with a Microsoft account
• I don’t use Edge
• “Get tips and suggestions when using Windows” is disabled
• “Suggest ways to get the most out of Windows and finish setting up this device” is disabled
• Windows welcome experience is disabled

I’m not sure where it’s coming from, but I’d like to nuke the whole “feature”. Any ideas?