I have smart plugs from Innr, Samsung, Aqara (I think) and have never experienced the problem you’re speaking of. Mine are all ZigBee – not sure what yours are.

That said, I just got a bunch of Shelly EM Mini G4 and put them in some PowerPoints and they work great.

If you don’t mind some basic wiring they’re easy to set up.

Why are you searching for a solution to a problem you don’t have?

There’s nothing wrong with systemd.