Not much to add. I'm an LEO in AZ, almost every PD here issues a Glock 22. The sheriffs offices will issue the Glock 22 as well, but you can purchase something else from their list to carry. Some agencies are going to this and our range instructors are looking to add Glock 21 and the full size 9mm 17 or 19 as options we can carry but must buy on our own.
Strangely DPS our highway patrol is issued Sig P226 in 40 S&W. I think we are going to see a lot of AZ agencies leaving the Glock 22 as Gen 4s aren't being well received.