Similar idea was here - CA SSO : Align WAOP with added features from CA AG.
As a customer I don't see it happening - at least not quickly even if it's ever decided to be done. We are planning a transition to the Access Gateway here because of things like that; waiting years for stuff - in the hope it even gets accepted - to get into the WAOP that's already in Access Gateway isn't feasible anymore. The SAML dynamic auth isn't even in the latest CR08 WAOP.
Short of it is, I'd at least consider an alternate plan if you really need something like OIDC sooner than later. If Access Gateway supports your existing servers, you can possibly re-use those systems to transition to it without having to spend more $ on new server builds and operations of them.
Might also be able to sell them on some of the other stuff too like Enhanced Session Assurance...So "hey we gotta retire our WAOP but if we can get Access Gateway folded in then you get OpenID Connect, Enhanced Session Assurance, session linking, etc", maybe doesn't seem as bad then.
PS - I've run the Access Gateway with a separate Web Agent installed on same server no problems. I know they say it's "not supported" but so long as you keep them on unique ports it hasn't been a problem yet from what I tested .