Hugs! It could be some time yet, as they may hold on to that last feed for a while if you keep offering it.
I felt some sadness when I realised my twins had stopped breastfeeding, but also some relief, I must admit . I was 3 months pregnant at the time and wondering about the logistics of feeding 3 children. I know they wouldn’t have stopped if it wasn’t for the pregnancy, so I felt some guilt too and some still remains. Then when I had my third baby, one of my twin sons did resume breastfeeding for a short time, which was healing for us both. The other boy was horrified at the thought, as he had really moved on!
Sometimes one twin might be happy to wean whereas the other shows an interest in continuing.