The scripts he wrote to pull the data were written in TypeScript, though all the TS I see is in the parameters in the function signature. Also he used Next.js for the dashboard

I think the GP's point was that the part of the article that's most interesting is the investigation into how the DMV's plate system works. The fact that Typescript was used is incidental (of course this could have been done in pretty much any language), and it's an odd choice to include the language choice in the article title.