Does it produce female flowers, you know the small nuts? Natives can be late to start bearing. But 30 yrs? That seems extreme.

It would help to know if it flowers and doesn't set, which would be very strange, or doesn't flower at all.

I've never noticed flowers but can't say I was that observant, I will next year as I have 2 more that don't produce. I had read native pecans usually reach maturity at 20 years, I am sure these are much older, and again, not sick or not visually apparent