I have no idea how to add spoiler tags, so this is the warning prior to my spoilers...
There is a current bug for the PS5 version of the quest Break Yurgir's Contract. When attempting to kill the rats ( or making a deal with them and then attempting to kill them anyway ) none of the rats will spawn and engage you in combat. You can kill the summoned rat at the bottom of the pit, and that's it. Nothing happens and there is no work around. A sad day for Yurgir indeed. Raphael truly is a devil.