Remove notifications with ADB?

Hello,

I have a phone running Android 13 with Duraspeed. It's an app meant to optimize battery usage by closing background apps. The problem is that this app keeps sending notifications incessantly.

The app is not visible in the apps list: so it's impossible to delete its data or disable it through the interface.

In its settings, the features are disabled for all apps individually + in general, the notifications sent concern three apps as if optimization was enabled for Duraspeed and these apps, but that's not the case.

I tried deleting and reinstalling the three apps. I tried disabling all their limitations, but nothing works: Duraspeed continues to optimize them (even if I don't open them all day) and sends notifications about it.

In the notifications management, I can access Duraspeed's notifications, but everything is grayed out: it's neither possible to disable them nor to mute them (which wouldn't be a solution in itself but would limit the damage).

The app is most certainly faulty, but these notifications are hell, especially when I suffer from attention disorders like I do.

So I'm trying to disable it using ADB and it doesn't seem to work...

I tried this:

adb shell pm revoke com.mediatek.duraspeed android.permission.POST_NOTIFICATIONS

I get an error indicating that basically I don't have the rights to do that... How could I disable these damn notifications?