There are some apps that get real annoying. Like for example Windows Mail app. I really dislike the interface and prefer to use Outlook, but when I receive an email I will get two different popup notifications on my computer for each application. I found that the best way to remove it for good was to use PowerShell commands.

To view all installed Windows App Packages for Windows 10:

• Open PowerShell with admin privileges, and execute the following command:
• Get-AppxPackage –AllUsers | Select Name, PackageFullName

Here are some more examples of commands to remove different pre-installed Windows 10 applications:

• Open PowerShell with admin privileges, and execute the Remove App package command

Windows Mail app	Get-AppxPackage Microsoft.windowscommunicationsapps | Remove-AppxPackage
Microsoft People	Get-AppxPackage Microsoft.People | Remove-AppxPackage
Microsoft YourPhone	Get-AppxPackage Microsoft.YourPhone | Remove-AppxPackage
Skype	Get-AppxPackage Microsoft.SkypeApp | Remove-AppxPackage
Mixed Reality Portal	Get-AppxPackage Microsoft.MixedReality.Portal | Remove-AppxPackage

References:
https://learn.microsoft.com/en-us/powershell/module/appx/remove-appxpackage?view=windowsserver2022-ps