This is a late reply so you may have already noticed by now, but in case you didn’t (or someone else who passes by doesn’t notice) - ProtonDB by default lists Steam Deck users on the top half of each game’s entry now so you won’t see those users hardware as it should be the same. However, on the second lower half of the page you’ll see people who aren’t on Steam Deck and generally users have their HW included so it shows up to the right of their comments.
I think its incredibly silly that it can’t be changed. I don’t have a Steam Deck for example, so I use this Tampermonkey script to add a collapse button to it (I don’t want them completely gone as its still a good rough indicator).