I'm no expert on this but I read a lot, I observe a lot and I was active in Big Brothers Big Sisters for a while.
I think many single/divorced moms are doing a helluva job raising their kids. I think those kids benefit even more from a positive male role model who's actively involved in their lives. If it's not the kids' biological father, a good step-father, an in-law or another trusted relative can help tremendously in this regard. Most importantly, though, biological dads need to step up and be responsible parents. They did the deed that brought the kid into the world, and they need to buck up and be an active participant in their kid's upbringing.
Boys and young men are in trouble in this country. They are, in many cases, adrift. They're falling behind academically, they're not going to college in numbers like they used to, and many good blue-collar jobs that used to provide stable employment for men have been off-shored, have disappeared because of automation, or will be eliminated in the not-too-distant future due to AI. A good male role model, a positive male influence with a brain, can help steer boys in the right direction - - in more ways than one.
Finally, I'm not at all active in the organization All Pro Dad for which Tony Dungy has served as the spokesman, but I believe they do a lot of good and their website provides some sound guidance for a being a better husband, father and man.