24-bit/192 kHz Hi-Res contents from Qobuz is supported as long as your Qobuz subscription has it. To allow the WiiM device to stream Hi-Res content from Qobuz, please make sure the Qobuz streaming quality is set to the right resolution on the WiiM Home app. Please see the screenshot below and follow the steps (1 to 3) to change it.
You can also see the bit rate, sample rate and bit depth in the 'playing now' UI on the WiiM Home App.
Besides Qobuz, Amazon Music Unlimited supports up to 24/192 audio too. If you have your own NAS storage, you can play you local library up to 24/192 on WiiM Mini and WiiM Pro via the WiiM Home App.