Because it's a badly written article. Texas isn't banning these companies, they are choosing not to do business with them for government contracts. Essentially

Because it's a badly written article. Texas isn't banning these companies, they are choosing not to do business with them for government contracts. Essentially, Texas made fossil fuels a protected class, and won't fund companies that discriminate against them. The Federal government did the same thing for companies that don't follow government guidelines for gender and racial discrimination.