@Julie M
I understand your printer is not visible in Printers & Scanners but does work when you print from an application.
I suspect this is a Windows issue and not directly related to AVD. I was able to find similar threads where users had similar issues. Please check and try some of these solutions.
Resources:
Printer not showing up in devices and printers
Connected printers not showing in 'Devices and Printers'
Printer not showing up in Win 10 Printers & Scanners
RDS Redirected printers not showing up in Control Panel or Settings app
Hope this helps! Let me know if you are still having issues or need further assistance.
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