I’m just one data point but there is in my opinion a market for:
“I don’t want to talk to people about it, I don’t want to read books about it, I don’t want to connect with anyone about anything in any app, but I’d like to get nuggets of science-backed info about how to be a better dad.”
4-minute dad: you can literally read parts of guides for 4 minutes and then get back to your life.
Parenting book digests: spoiler alert, we're working on it... in 3 weeks if all goes well. But only with the paid membership.