Q.What Am I Doing Wrong
I have this lime tree that is losing its leaves. I’ve had it since roughly January and was watering about once every week-2. It was always outside. About 2 weeks ago I put it into a larger pot and began watering it every day or every other day. The first picture was when I first put the lime into the new pot. The subsequent pics are today. I have a Meyers lemon tree I have been watering at the same frequency and it is not losing any leaves.

Certified GKH Gardening Expert
I was going to send you an article about leaf drop in lime trees, but instead I'm sending a link for a page with several articles. It's possible that your tree is suffering from a bit of shock due to the transplant. Browse through these GKH articles and I think you'll find your answer:
https://www.gardeningknowhow.com/search?q=lime%20tree%20leaf%20drop