You're right, of course, that it works just as well in playback without putting a Coda sign at the end of the solos.

But an isolated Coda sign is confusing to understand if you're reading the chart. When I looked at yours I was confused and looked in vain for the companion Coda sign.

It's unfortunate that iReal Pro has to depart from standard musical practice in order for it to play the way one wants.

Cheers,
Jer