During covid my parents could barely get milk and meanwhile we were drowning in it.
Some crazy stuff in this article by an Ag producer: https://agmoos.com/2021/12/10/supply-and-demand-are-the-real...
And competition between cheese, cream, ice cream makers for tight milk availability: https://nypost.com/2022/10/03/heres-why-the-us-is-facing-a-b...
Around here milk is a bit higher than before, but there's no shortages of anything cow related.
It's not really surprising, it doesn't ship well or age well (at least, not as liquid). You can do things like UHT but it negatively affects quality and makes it useless for a lot of things.