I know a couple that were 2 weeks apart in age and their relationship was a shit show. I know a couple that's 30 years apart and they couldn't be more in love and by all measures have a beautiful partnership. Age, by itself, doesn't mean a thing to a relationship. You can have generational and cultural differences that make a relationship difficult regardless of the particular age gap.
Certainly there are lifestyle differences that may be impacted by age. I know in my early 50s, I can't really join my boyfriend -- who is 20 years younger than me -- when he goes to the rock climbing gym. And when I want to go with friends to see the Flock of Seagulls in concert, he's more than happy to sit at home and listen to Lizzo. Those differences for us are not problems -- for some folks, they might be problems. But that's not a lot different from one person being a carnivore and the other being a vegan. Or one being religious and one being an atheist. It's as much, or as little, of a problem as you want to make it... just like anything in a relationship. If your relationship is not meant to be, it will fall apart for any reason, or no reason. If it's working, then it will work despite all the differences.
Bottom line: if you are getting along, don't obsess about age differences, focus on things that really matter, like how he squeezes the toothpaste tube. You might find some other folks have issues, but if you don't have an issue, then as the great philosopher RuPaul says: "'less they payin' yo bills, pay them bitches no mind!"
