The "unremovable" part is inaccurate. While you can't completely remove it because it resides on the system partition, you most probably can still disable it with an adb command:
adb shell pm uninstall --user 0 com.package.name
This command is very powerful as it works for any app, even those that have "disable" greyed out in the settings. I disabled the Galaxy Store on my S9 this way for example. replies(14):