Hi @saganjames, I had not heard the term neck crepitus but I'm sure a lot of us in the older generation have it to some degree. A few years back I took a safe driving class for 55 and over to get an insurance discount and one of the things we learned was neck exercises to help with your neck movement to help when driving. The exercises were the same as the ones described here:
--- Neck Arthritis: Exercises: https://myhealth.alberta.ca/Health/aftercareinformation/pages/conditions.aspx?hwid=zp4385&

There is also a good explanation along with a link to more exercises at the bottom of this article.
--- What Is Neck Crepitus?: https://www.verywellhealth.com/neck-crepitus-5114111

@letsolve and @bbtn have posted about crepitus in other discussions and may also have some suggestions for exercises.