For years Intel and AMD wanted Android on x86 to happen, and wanted embedded x86 to compete with ARM. It never happened because in small devices SoC is a requirement.
As transistor sizes shrink it becomes more and more insane to divide your system up into two or more dies just because some IP licensing requires it. ARM are swimming against the tide that lifted them for 20 years here.
They seem to be abandoning the embedded market that made them a huge success in favour of trying to enter a super competitive server market where they are only one of many players.