Yes, you can find a full list of chords supported by iReal pro in the chord library in the app.
https://forums.irealpro.com/threads/What-notes-are-in-a-Minor-six-chord&p=39351.16187/#post-39351
Or, when editing or writing any chart, enter a root name in the chord input window, then touch the three-line icon on the left to see all the available qualities.
)BOB
