It’s not made by Epic Games, it’s just the launcher they are using (to the annoyance of many of us who bought early access which had their own launcher). It was pretty good in EA, but I haven’t tried it since so I can’t say how it is now. Might pick it up on the switch to try it between Diablo sessions…
My girls are still only 1 and 3, but so far I’m sneaking in an hour or two in the evening, after everyone else has gone to bed. I’ve started introducing the older one to Pokemon Go and Let’s Go Pikachu, and she loves it so far despite not knowing much english. Hopefully I can get them into gaming so we can have that in comon 😄