In all the weddings I’ve gone to, there was only one (aside from the ones at a masjid) where there was proper segregation in the banquet hall. Separate halls/rooms for the men and women. An all women wait staff for the ladies side and a female photographer for the women’s side. In this setting, the hijabi women felt comfortable taking their hijab off and enjoying the wedding. I think the groom only joined his bride when it was family only and then whoever wanted to put her hijab back on, did so.
For the rest of the weddings, aside from the partition, the segregation is not complete - just done on a piecemeal basis.