It does seem a very basic requirement that I am astounded is not available. I’m not pointing any fingers as to who is responsible for its omission btw. I have to say I am not especially impressed by the Qobuz Android app when using it on an Astell & Kern DAP and it seems impossible to get either company to take responsibility for its significant failings. In this case, however, the main problem is, apart from generally running quite slowly, that it is unable to cope with any significant amount of downloaded material to the device which you can of course do within the Android and iOS apps. The Offline Library option is unusable - clicking on it will cause the app to take at least 6 minutes to display anything and eventually crash. You can cheat by accessing releases offline through the ‘My Qobuz - My Favourites’ menu but you get network error messages and no cover art. The app usually freezes when downloading releases as well. I do have over 300GB of data downloaded onto the internal 512GB hard drive, but there is nothing in the Qobuz advertising that suggests you are limited in the amount of material you can download. Also there is no problem using Tidal in this way.
However, it is possible to sort favourites alphabetically by artist!