I have a collection of seminars recorded as mp3. In iTunes, I marked them as audiobooks.
I have an Apple music account, so I can access my music library through iCloud, including those I recorded myself or ripped from my CDs.
My audiobooks do not show up on the iCloud and I cannot access them on my iPhone (iOS 12.3.1).
I do not see them in the Music app, I do not see them in the Books app -although it has an audiobooks section.
I found some 3rd party apps on the store that play mp3 audiobooks, but I'd prefer using the Books or Music app.
Is there a way to do this? If so, how?
Note: I asked this question in Apple Communities but it did not attract much attention.