Privacy filter means "HP Sure View Reflect" I guess?. There are 3 options for current HP Elitebook screens [1]. Only 1 of them has the privacy filter. I think the best option is to buy the middle one in that pic (low power, 400 nits).

[1] https://www.notebookcheck.net/fileadmin/Notebooks/News/_nc3/...

Source: https://www.notebookcheck.net/CES-2022-HP-announces-the-Elit...