Do you have any time for yourself? -> One kid is not that bad from a free time perspective, but when you have two there's maybe five hours a week for each parent and it ends up being zero sum with two (or more) on one childcare.
Where are all the tech dads? -> Age peers in tech don't seem to have kids despite being the small slice of people arguably able to comfortably afford it. Mostly seem to bank up cash and have kids in mid to late 30s and slow lane themselves.
I wrote a bit about my experience being a founder and a dad where I started my company in the same month as my wife and I found out she was pregnant with our first child. Link here: https://rogerkirkness.com/founder-and-father