Steam apparently has a feature that notifies you when it is your turn for games. This seems like a really under used feature and while I don't know if it will activate for combat notifications I don't see why a turn based game such as Humankind, and Endless Legend, Space 1/2  would not be ideal for this feature.
I'm going to include a link to the filtered steam search so one can see what I mean
https://store.steampowered.com/search/?category2=32