Yes they are @Joel, but they still use different systems.
The long term plan is to use CYBG’s iB platform for current accounts and savings accounts (and migrate from the old Virgin Money savings platform to iB) and use the Virgin Money credit card platform, migrating CYBG credit cards across to this platform from iB and then integrate the credit card part of the old platform with iB. Virgin money essential current accounts are then going to be moved across to iB via the switching service.
All of this is being phased in very slowly to avoid a TSB-style meltdown!
So, for now, there are still separate Clydesdale Bank and Yorkshire Bank logins which could be integrated into Emma via Open Banking. The Virgin Money integration only does savings accounts and credit cards at this time, and even though they will all eventually be moving to this branding the current Open Banking integration is actually an integration to the legacy Virgin Money platform and not iB. This is because Open Banking arrived before CYBG and Virgin had completed the merger process, so they were forced to build in support for Open Banking to the old platform.
TL;DR
What is really happening is a merger, where most of Virgin Money is being moved across to CYBG’s IT systems and company structures, before CYBG is then rebranded to Virgin. So the finished bank will be mostly CYBG, but called Virgin Money.