Guess I moved her at the perfect time

I finally moved Uni out of the .5 gallon temporary habitat she was in (I was doing 3 large water changes each day since it was unfiltered) This habitat is around 3-4 gallons. She still can’t swim without being vertical, but she’s way more active now. I definitely don’t think she’s going to be able to learn how to swim horizontally like a normal fish, but she doesn’t seem unhealthy aside from this and discoloration on her sides. She was a betta I rescued from a Petco. When I found her she was laying on her side using her tail to hold herself up. I’m hoping she will continue to show the healthy behavior she’s been exhibiting.