The VPN service module never has been supported in CatOS (directly) and most likely never will be, as the VPNSM is basically an accelerator module and all configuration is done in IOS. (Unlike the FWSM, for example, which runs its own software etc.)
I guess VPNSM could potentially be supported in Hybrid (CatOS+IOS) in the future, but it never has been.
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...