In the new version 2020.9, the output level of a WAV file exported by Share Audio cannot be controlled by the playback Volume control. The output level is fixed regardless of the Volume level.

In the previous version, the Volume control did also control the output level of exported WAV files.

I import the WAV files into my Boss RC-30 looper (making it easy to start and stop backing tracks with my foot), but that looper requires the level of the WAV file to be set relatively low, otherwise it is way too loud.

So with the new version of iReal Pro the WAV export to my looper has now become a 2-step process where I have to import the exported iReal Pro WAV file into Logic (probably could use Audacity as well), to reduce the volume to a low enough level, and then bounce from there to another WAV file.