KiCad V7 can still export and import “Specctra” files as an interface to an external autorouter.
As far as I know, KiCad has never had a built in autorouter. Older KiCad versions (V4 or V5?) used to have a more direct interface to directly interact with an external autorouter (notably freerouting, but these days you have to work with those Specctra files as intermediate step.
An autorouter is not a high priority for the “KiCad team”, for several resons. First, they are not the magical tool beginners often think they are. Second, to make an autorouter that is good enough to be actually useful takes many years of software development from several people, and KiCad does not have the resources (yet) for that.
There have been some long threads about autorouters and their usefulness in the past.
https://forum.kicad.info/search?q=autorouter
From what I remember, the link below is the most comprehensive discussion: