It can be done, I have all of my files on my phone as a backup to my computer in live performances.
In my case the phone is not playing BIAB but just the saved files.
Caviat, my BIAB is on a MacBook Air. Caviat #2, I did this years ago and my 78 yr. old memory may not have all of the details to get this done for you.
My iPhone is a S.E. which I believe is similar to a 7, iOS 12.3.1
I rendered all of the 150 files before transferring them, therefore they cannot be edited once on your phone.
Next they were put in a folder in iTunes, in my case “rendered BIAB ‘17”
On the iPhone, I downloaded Denon audio app from the Apple App Store.
This next part I not sure of but I think that when attaching the phone to my computer,
all that was required is that the folder with the rendered BIAB files was checked for it
to be included with the update.
Once the files were transferred to the Denon app they showed up as “rendered’17”
Opening that you have access to all the BIAB files.
I hope this work with Windows.