IPAM definitely works with Cisco ASA devices. Cisco 3650 is not on the list of supported devices. Most probably Cisco 3650 requires a bit different commands to get scopes info. You can check IPAM logs and detect errors
I don't know if this was a known issue, but it is working for me now in IPAM 4.7.0. We were running on 4.3.2 before.