I've had leg cramps before PMR but have not noticed an increase or decrease in the incidence since my diagnosis in July 2023.
I do use TheraWorks (foam) at the first twinge that I might be getting a cramp. It has always worked very well for me. I also think heat helps. So if you have a heating pad, try that. I do not drink enough water and I'm told that will help, but I don't like plain water so it's hard for me to drink as much as is recommended.
Good luck with this.