Did you ever test this? My use case would be to have a primary and secondary Anyconnect connection (prod and DR) so if prod were unavailable it would fail to DR IP behind the SRV record.

This is another reason I will never recommend Firepower. There is no official way to add snmpv3 that I can find. The process is WAY overcomplicated. When I search for it I come across random blogs with only snmpv2. Cisco has lost my trust in the NGFW...