You can run more than that but I think half an hour steady state easy run each morning gives you 80% of results. If you love running (I do), knock yourself out. But that half an hour is enough to do wonders to your health over long periods of time with minimum chance for negative consequences. By easy run I mean one when nothing aches and you can converse easily throughout the run.
I think a lot of people go hard on it and overdo it and then get injured or stop it for other reasons. It is better to make those runs easy and enjoyable so that you can keep running daily forever.
I have also started 4/20 intermittent fasting 3 months ago and keto a month ago and I can tell you, I have never felt better. And this even when I do 10k run in the morning on an empty stomach after 18h of not eating anything.