If you have the service 4x4 light on check out this potential easy fix.

here's the link to the part I used.

Dasbecan 4x4 Front Axle Actuator... https://www.amazon.com/dp/B08QJ2LL55?...

here's another one if the link above doesn't work.

SecosAutoparts 68216944aa 4x4 Front Axle Actuator Fork Disconnect 68216944AB 68216944AA Compatible With Dodge Ram 2500 3500 2013 2014 2015 2016 2017 2018 https://a.co/d/72rY1hl