Any touch enabled monitor would work, from professional brands like Dell or Asus, to cheap external monitors off your favourite Chinese site.
You’d obviously need to have separate hardware to run the OS (and no, this can’t be the same server that you’re using to run HA). Depending on your mounting space and whether you intend to use it for other apps, anything from a small intel stick to a Raspberry pi 5 hidden behind the monitor will do.
Hell, you could even go all out and get a micro pc (something in this form factor) if space and cooling requirements aren’t an issue.
There’s a few threads on this forum about this, but if you want specific model recommendations, there’s plenty of posts on the Home Assistant Facebook group. Good luck!