I don't know the specifics of TX, but in AZ the Hispanic vote has definitely swung the state purple, trending blue. They really started to organize in 2010 as a direct result of the state law 1070 which disproportionally impacted the Hispanic community - some would say it was directed at them. Their first major victory was in 2016, getting Sherriff Joe out, then in 2018 swinging the state wide election for Senate to Sinema, and obviously recently turning the state blue for Biden and also getting Mark Kelly elected.
The redistricting, which is independent in AZ, may turn the state legislatures blue before long.
So TX Hispanics, if organized could majorly impact state wide contests, less so the legislature as obviously that's gerrymandered.
People can see how organizing and getting out the vote, through years of hard unglamorous graft, can have enormous impact, see GA also.
As an aside, there are a lot of Hispanics whose families go back multiple generations in TX & AZ. Basically, they were here first and stayed. It must be very frustrating, irritating and beyond annoying to be profiled as an immigrant (& illegal to boot), by recent blow ins when your family goes back as far as many do.