I have a friend who is Type 1 diabetic and we’re both cyclists of a distinguished age.
He like you finds that the exercise helps manage his condition.
About a year ago a cyclist from Novo Nordisk came to give a talk in a local city. I’d been following Team Novo Nordisk for a while so I was keen to hear what he said as the team ONLY employ diabetics (I presume T1 only). He gave loads f really good tips for both diabetics and non-diabetics.
He left with an open offer to help. My mate has asked a few questions via Facebook; I’m sure the offer stands as the entire point of the team is to support diabetics getting into cycling (and parallel endurance sports).
Hope they come up trumps as the guy was really friendly and open.
Good luck.