During my testing, I found that our Zebra printers would not install on Windows 10 once the printers were migrated to Server 2019. I use Group Policy with the "Update" option to install these printers. I couldn't even install them manually without an error similar to "a policy is preventing this printer from installing". It turned out to be the driver version on the new server. I had to get the newest driver from Zebra. I changed the driver in each queue and the printers installed but some features didn't work correctly. I then deleted the print queues and re-created them using the latest drivers. This was very tedious because each queue had many setting changes that needed to be made. I wish there was a quicker way of doing this.
Now I'm thinking that because of the driver change, I'm going to need to change the Group Policies for these queues from "Update" to "Replace" once the new server goes live. Hopefully that deletes the queues on the client PCs and replace them with the new ones.