Modders SUS x DOOM decided to diversify the adventure in The Witcher 3: Wild Hunt and added the ability for Geralt to assemble a company of companions.
This became possible thanks to the Multi Companion Mod Enhanced modification:
Another mod, Horse Riding For Companions, adds the ability for Geralt's companions to ride horses — you can assemble a cavalry squad.
The Multi Companion Mod Enhanced mod for The Witcher 3: Wild Hunt is distributed free of charge via Nexus Mods. There is a nuance: the system considers it an "adult" mod, so you need to log into your account to view the page (the display of "adult content" must be enabled in the settings).
There is no such problem with Horse Riding For Companions.