I had a Madeline des deux Saisons that I bought last fall as a pretty small fig with just 2 whip-like narrow trunks. It developed a breba fig this very spring.
I just say that because I find it hard to believe the figs have never fruited for you in pots, although I’ve heard it is possible with certain slow-growing varieties that can take 3-5 years to bear. So I suppose it’s possible but it’s very odd. Most figs growand fruit quite quickly in pots in my limited experience. What varieties have you tried in pots? Could you describe in detail your pot culture, like size of pot, type of soil, typical annual growth, etc? What do you do with them during the winter?