I love IG's format for comics.
Here are some I follow:
https://www.instagram.com/robotatertotcomics/ - Jake's son. Little genius..
https://www.instagram.com/hannahhillam/
https://www.instagram.com/mrlovenstein/
https://www.instagram.com/momopopoworld/
https://www.instagram.com/safely_endangered/
https://www.instagram.com/adamtots/
https://www.instagram.com/falseknees/
https://www.instagram.com/poorlydrawnlines/
https://www.instagram.com/birdstrips/
https://www.instagram.com/simkaye/ - comics mixed with non comics ( I love her comics sooo much)
https://www.instagram.com/cassandracalin/
https://www.instagram.com/pantspants/
Also check out tapas! https://tapas.io/ Post, get views, get supporters, get paid. You retain rights as far as I know. Tapas would be the best for kids, and they have a great app.
Over 53k reviews for the app on google play, over 1million installs..
So many wonderful creators on there. Many from my list above also post on tapas..
Then there are web comics that are not for kids that I won't list here.
Webcomics are alive and well.