Products used for skim coating textured walls

Previously I posted about hiring a plasterer (gibster).
Not surprisingly the wheel of home renovations continues to spin.
Quick question about products/brands used by professionals and or DYI.
Has anyone come across professionals using a product that is a Primer/ joint compound combi?
When I was looking for a pro to skim coat my walls there were many different methods and steps depending on who you ask.
For me, it’s really important to Prime over painted texture before the skim coat. I also found it interesting that they all said they only use Swiss products as if saying “we only use the best Swiss quality available’
Are there really professional joint compounds that contain the primer or are they just trying to save time by not priming at all?
I’ve tried looking for such a product but couldn’t find any.
Thanks in advance.
Lucy.
p.s. I really hate going through an entire house renovation.