I finally was able to unpack new smart tv at new home, and connected a firetv stick on hdmi port 1 of tv.
I downloaded KODI on firetv stick and an usb disk to my fritzbox, that can act as a multimedia server.
I set up hdmi input of smart tv to pass through in PCM format to optical output, connected to WR-1.
I also connected a pair of active speakers to WR-1 RCA output.
It works fine, so i can have a semi-Roon system that read in my DLNA archive and show me a lot of other informations from various online database, while im listening my music.
I think it should NOT damage digital signal from my disk to WR-1, because WR-1 DAC will do the work.
This way i can use WR-1 bypassing the limitations of native app and the fact that the alternative Bubble app its not ready for IOS .
A difference between this way and the original app is that output levels are minor in KODI way. Quality seems to be the same anyway.
Another possible issue im investigating on, is that with KODI setup i built, sometime, i can hear something like some micro gap during the listening (but you have to be VERY concentrated on it).
It looks apparently solved now, with moving firestick on an hdmi without ARC ability, deleting unusued app on firestick and some little other setup of various KODI menu.
Im very satisfied of the sound im listening now, but will continue to experiment and to looking out for new possible better solutions.
Let me know please, if somebody is testing the some or other ways . Thankyou