I've used both the Dragonfly Red and the Chord Mojo with Tidal Masters (MQA). If I remember correctly, when I ask the Tidal app on my computer to decode MQA, I always get 96KhZ files (that's all I can understand from the colours on the DACs, I can't get info on the bit depth). But when the DACs do the decoding, it can also be 48KhZ (so perhaps that was the highest available for the album I was listening to). I'll have to try again. I'll also need to check how the decoding works with my iPhone, via Camera Adapter and Mojo (I sold the Dragonfly).Supposedly, if you use something like a Dragonfly or some other MQA DAC with TIDAL it will unwrap the whole thing to the highest res of the file.
Qobuz is a great alternative, but it's not available in all countries. In Australia, I think that Tidal is our best option for the moment, and I really like it. I've been having Tidal since 2017 (a family plan that I share with my partner and my sister). We love the interface, the music selection and the fact that it works in wasapi exclusive mode (something that Amazon doesn't do, nor Apple). But I hope Qobuz will come to Australia, at least to try an alternative. I would also buy from them if I was given a chance to!