I didn’t catch that last part of your sentence where you said the lever wasn’t working.
When mine are locked into driving position, they can wiggle left to right slightly. If it’s not straight when I go to pull the lever and release them to swivel them around, they don’t release. So maybe give them a wiggle while pulling the lever.
also, do you feel any resistance on that level when you pull on it? If not it may very well be broken.
maybe also try pushing the lever in