Official support should coming soon...ish. A week ago:

> We are still working internally on getting this out for you, and we're just as excited about it as you are! Currently we're hoping to see this hit with v58, which should be ready for production around 12-16 weeks from now.

https://features.cpanel.net/topic/provide-support-for-lets-e...

So probably around august-september we will have official support.