If the Xbox sync button is not working, replace the controller batteries first and see. This article lists some fixes that will help you.

A new post on Xbox Wire by Mike Ybarra reveals that Microsoft is changing how the home button will work on all Xbox One Controllers in an upcoming update.

Some Xbox Wireless Controllers currently have issues registering button presses. Microsoft is aware of the issue but does not have a fix for it yet.

Wired & Bluetooth controllers can be used for Xbox Cloud Gaming but they can break down. If Xbox Cloud Gaming Controller is not working, do this.

Nintendo and Sony have their drifting joysticks, but Microsoft is currently faced with its own set of controller button problems for the Xbox Series X and S this generation, partially a carryover ...

Alongside the Xbox Series X, Microsoft showcased a revised Xbox controller, which will work across all Xbox One consoles.

It's certainly not too late for Microsoft to get its Xbox One buttons working in a useful, predictable way. They could do what I'm suggesting and re-brand the View button.