Is based on vaccine availability and you must be registered with the VA medical system. If you are, I would recommend you call your local VA hospital and asked them. I have validated this with other veterans around the country and is just not in South Florida.
This is the TXT they sent me last week, of course, I responded immediately and got the vaccine on Feb 10:
"Miami VA Medical Center is offering COVID-19 vaccines to Veterans who receive care at VA.
To schedule an appointment, please reply to this message with a date and time you would be available from Feb 10 to Feb 20
Please respond within 24 hours. More Info: https://go.usa.gov/xASD8 "
Hope this helps.
JP