Hope it goes well for you both!
I think there is a slight increase in risk of children being born to a T1 parent going on to develop the condition, so I’ve always had that in mind with my two - but neither have ever shown any sign of diabetes symptoms so far and are now both in their 20s
I made sure my wife had another person in attendance as well as me at the births, just in case the weirdness of the situation and/or any rushing about caused an unexpected drop in my BGs. though to be fair, my diabetes was much less predictable at the time and I wasn’t so good at reducing hypo risk.
Actually reducing any incidence of hypoglycaemia would be my main recommendation to you as a new Dad with diabetes. Your partner will have more than enough to deal with looking after the little one(s) - especially as they start getting mobile - without having to worry about whether you are going doolalley in the chilled aisle at Asda!
Let us know how things go!