The Guardian claims that Google employees are "not optimistic" about the chances of the Cupertino company giving them the green light to release the software on the App Store.
The iPhone maker dropped Google Maps as its default mapping software ahead of the launch of its latest operating system in favour of a first-party service developed in conjunction with sat nav firm TomTom.
However, users reported a host of inaccuracies with the new service leading to it being widely criticised. Apple CEO Tim Cook later issued a humbling apology for the debacle.
Although Apple currently hosts several alternate mapping apps on its App Store and Google Maps remains available through browsers, the latest reports suggest that the firm does not wish to promote its rival while it works on correcting its own Maps.
The replacement Google Maps app is expected to be submitted to Apple for approval later this year.