Neither did our older 5th wheel rv hitches. All we had was fore and aft articulation.
I've owned a couple of 5th wheel rv hitches with fore and aft only.
Side to side articulation 5th wheel rv hitches came around in the '90s era.
Some folks didn't like the side to side articulation.......so one mfg added a lock out device which IMO was silly to begin with.
JMO but there is no industry std 5th wheel hitch height over the years. Now one mfg may shoot for a particular height number.