If you are in the US, check out Hoopla digital for quite a few good audio books you can borrow. Bonus: you’ve already paid for it through your local library.
Do they have any artificial restrictions? Last time I tried a similar app (it's been a few years), I wasn't able to get an audiobook because someone else already had it "checked out".
That's what feels strange to me, though. It's not a physical book that can only be in one place at a time, so why are we holding ourselves back with artificial limitations?
I suspect it has something to do with licensing, but I don't know for sure.