(That's Houston and Ft. Worth areas)
In this last election?
I’m completely unaware of how it would be possible that Dom machines were or could have been used if the TX SoS refused to certify them.
http://www.tarrantcounty.com/en/news/2019/new-voting-machines-arrive-in-tarrant-county-.html
Apparently, Tarrant Co used machines by Hart Systems.
https://www.tarrantcounty.com/en/elections/hart-voting-system.html
and rejected Dominion and ESS systems. (eg; “...chose Hart over Dom or ESS...”)
https://www.star-telegram.com/news/politics-government/election/article233785927.html