CBR seem to believe that Teela and Andra were supposed to have a romance and that it got 'nixed'
https://www.cbr.com/masters-of-the-u...andra-romance/
Adam and Teela as an endgame has never been realized before in animation even if it's happened in the comics and the original spin-off bibles. We were well overdue representation for them in this medium
It's also a case of them seeing what they want to see, at no point did Andra ever come across as anything but a window into the world for the casual viewers and became increasingly useless as the series progressed because her purpose was served. Teela's whole deal the entire show was in figuring out how to grieve for her best friend and process his betrayal of her trust while learning to forgive him and come to understand his need for secrecy, the whole time, she is clearly in love with him and noone else.