The new Repeater-mode seems to work fine, You can set one interface in client mode and one or more virtual interfaces in station mode, either on the same SSID or on a separate SSID.
I am missing one feature though - WIFI client + CAP client.
I want to configure a couple of HaP Lite's as clients on one network, and through this interface connect to a CAPSman for receiving (and controlling) the end user WIFI on virtual wifi interface(s).