Unfortunately, lyrics usually more horizontal space than chords. iRealPro provides max. 16 chord 'cells' per line. Usually there are 4 cells per measure.
So either the lyrics of some measures will overlap with other lyrics, or you need to make the measures very wide (taking up more cells), losing the nice compact nature of iRealPro charts. The horizontal limit of approx. 14 lines will also kick in quickly.

While it may be possible to do this for some selected songs, I do not consider it viable for general use.