The Three Danvers Sisters

Alex finds out that she and Kara have another sister that was in the military but was reported MIA (Missing in Action). Carol Danvers just got her memories back and helped bring the population back to where it was before Thanos attacked. She remembers her younger sister Alex and her younger adoptive sister Kara. She has only told Natasha and her friend Sara Lance about them. Now that Thanos is gone she wants to find them. This is after endgame with a slight change and not really going to follow the story line of Supergirl much other than the villains they face. Brainy and Nia will not be in this. Nor will some of the Avengers mostly just the girls.
Ships:
Alex x Maggie
Kara x Lena
Carol x Natasha
Sara x Ava
James x Agent Hill
Winn x Wanda