Where is sculpt vertex paint in 2.92? I have seen YouTube videos featuring sculpt vertex paint but the buttons for it don't appear in my sculpt menu. Some people have said it's an experimental feature that needs to be activated in the Preferences window but it is not included in the options. Has it been removed from 2.92? Could someone please let me know?
Get an alpha version and Enable Develope Extras
Since somwhere around 2.9 version series appeared, some experimental features are hidden by default (they are not ready yet, we don't want a basic user to mess their file with them).
You can enable experimental fetures by enabling the Developer Extras checkbox in the Preferences.

Then the Experimental tab appears and you can choose the feature to enable.
Vertex color in sculpting is the first one.

You could probably find the features while 2.92 was in aplha or beta version, but nowadays that the version has become official, it was removed.
You are more likely to find them in old 2.92 alpha versions, current alpha versions, custom builds...