What do you consider 'as expected'? Personally I want switches that will turn off when flicked down, and turn on when flicked up. On the other hand, 3 way switches have already broken that rule so instead, toggling a switch will always toggle the light regardless of its position.

If that toggling is okay with you, I've heard good things about Shelly which you can use to convert a regular switch to be smart. Otherwise I'm looking at GE Enbrighten switches which looks to keep the switch itself in a neutral position and have two buttons on the up and down rather than being an actual switchable switch.