Where is the Colorsync in Monterey ?

Nothing in terms of ColorSync or where profiles reside have changed in 12.x (a few more bugs...). 

You can find the location of nearly all profiles using the ColorSync Utility which is an application provided by Apple. 

One of the more common path's for profiles (there are a few): 

/Users/~/Library/ColorSync/Profiles

Place them there, you're good to go. But also see: 

https://helpx.adobe.com/x-productkb/global/access-hidden-user-library-files.html

There's a few places: There SHOULD be a Colorsync Folder in the Computer's root Library (not sure why you don't see it), as well as one in each homefolder <user>/Library, and even one in the System/Library/

What could help is to open ColorSync Utility and click on any profile and on the right, above the gamut map, will be the path to the file.