Tesla's smartphone integration continues to be an area where Tesla is falling further behind the other vehicle manufacturers.
Not only don't we have screen sharing (like Apple CarPlay and Android Auto), we also don't have integration of smartphone text messaging and e-mail (voice-to-text and text-to-voice).
Tesla provides a few integrated apps, but has glaring holes, such as the inability to effectively play audio books with the media player - either with an app like audible or consistently resuming playing of a USB audiobook (the software still frequently forgets the current media source/file/position).
It seems unlikely Tesla would license the Apple or Android systems, which is what the other manufacturers are doing. Instead, if/when Tesla does (finally) address smartphone integration, we're likely to see something that works better than the Apple/Android systems - and because the market is almost evenly split between Android and IOS, the solution should work with devices using either operating system.
Over the years, Musk has made multiple comments about supporting 3rd party apps, 3rd party API (programming interface), app store, or providing screen mirroring.
And as long as Tesla was the only game in town for long range EVs, the lack of these features likely hasn't had any impact on Tesla sales.
That could start changing soon - as more competitors bring their long range EVs to the market - and some customers might begin to choose non-Tesla vehicles based not on the strength of Tesla's battery/EV technology or the Supercharger network, but on the other features (including smartphone integration) that aren't present in Tesla vehicles.
Plus, the lack of smartphone integration in the current software may be increasing driver use of smartphones while operating the vehicle - so the lack of those features (especially text message and e-mail support) could be lowering driving safety...