There have been a couple of these uploaded from Central Texas but it seems unclear which species they might be. I thought I would upload one of my observations and see if it contributes to the discussion since there is a bit more detail in these photos. Based on the guide pages, I would label this Eriophora edax - due to the prominent hump at the rear of the abdomen. To me, what we can see of the epigyne/scape looks more like Levi's drawings of E. edax, and less like images of E. ravilla from Florida (where there should be less chance of confusing the two species) although he mentions the length of the scape is variable in some species. I cropped and brightened the abdomen to try and show some detail. It's not great (my camera is showing its age) but maybe someone more experienced can read something useful from it.

I found this in my yard (Northeast Austin) so hopefully I will find another one that I can collect and make some closer/more useful images - this one was about 8 feet up in a hackberry tree and I had to stand precariously on a stepladder to get reasonably close photos.

On iNaturalist there are about 30-40 apparent Eriophora observations all around the Austin area, including some which look like E. ravilla with the pair of small dark bumps/tubercules at the posterior end of the abdomen. And a variety of the typical abdomen patterns shown on the BG guide pages for both species. So it certainly seems that one or more species are at least somewhat established in Central Texas.