Wow! Penon is super fast. Here's what I've got so far: The Cayin CS-40TC35 works quite well. The cable is very flexible. It plays everything from FLAC --> MCQ (88.2 Khz) --> DSD 5.4 Mhz. I'm currently using UAPP, which has excellent features and Tidal integration. It also offers MCQ playback (with in-app purchase) I have not tried this with Master versions in either UAPP or the Tidal app. (Sorry I no longer have a Tidal account, but as it works with UAPP, I have a high degree of confidence that it will work with your Tidal account or worst-case scenario you purchase UAPP.
Nice thing to note, even though the adaptor uses USB, it registers as Coax and you can switch between apps. I don't know if this is bit-perfect, but I have no reason to believe otherwise. Also USB-C is reversable, so you can stack your R6 PRO and put it on the bottom of the Hugo 2 for more mobility.
Bad news, the 3.5 Coax 4-pole to 3-pole did not work. I have contacted Penon and hopefully, they can replace the cable that I have received with a functioning one.
Here are some pics, so you can see how it might work for your specific needs.