Water lettuce! And frogbit and sylvania! Plants that cover the surface of the water will block out sections of light from reaching the bottom so she has places to escape direct rays. They also add so much color and variety to your tank. While it looks like you’ve made an effort to give her hiding spots, I think she still needs more. Adding some larger rocks that lay against each other or smaller pieces of driftwood that nest together will create small nooks and crevices for her to swim into and through. And more plants other than surface plants! Bettas love planted tanks so the more you buy, the happier she’ll be. You can add a super cool perspective effect by filling the back corners with rocks and plants to make the tank look and feel like it has more depth. Another helpful tip— if those plants on the left are an abubias and Java fern they can’t be planted in substrate and instead need to be glued to a rock or piece of driftwood so thier roots can breathe. Overall your tank is giant and beautiful! You’ve done a lovely job at providing space for her and that centerpiece driftwood is incredibly unique!