Not sure if I am missing something but I am no longer seeing the input-specific volume settings in the Naim app 6.0.5 (for my Muso Qb 2). I have boosted Analogue volume input a while ago and now I am unable to find the setting again. (Looking at Input Settings → Analogue all I see is Input Enabled / Input Name / Dim Lights).
While my post was waiting for approval I tried to disable and re-enable the inputs and it worked. Looks like fresh install of 6.0.5 might mess up with default visibility though as I had the same issue on 2 devices - one iOS and one Android. The steps above fixed it on both. Thank you!