Hello Jacky,
You can deploy both L2TP VPN and Anyconnect VPN together on same ASA.
Since they are based on different protocols, you shall be able to deploy them in parallel.
There aren't any specific prerequisite to deploy them together as long as you have correct licenses and configuration.
Regards
Dinesh Moudgil
P.S. Please rate helpful posts.
Cisco Network Security Channel - https://www.youtube.com/c/CiscoNetSec/