Apple TV Remote
Can I buy an extra remote for my apple tv and program 2 remotes to work on the same TV?
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The Apple TV (4th generation or later) can pair with one Siri Remote at a time. Apple TV (4th generation or later) can listed to additional IR universal remotes, the old style Apple Remote (aluminum), or the software remote on iOS/iPadOS interchangeably.
Identify your Apple TV model - Apple Support
Identify your Apple TV remote - Apple Support
Use other remotes to control Apple TV - Apple Support
Apple Remote (aluminum) - Apple Store online
Set up the Apple TV Remote on your iPhone, iPad, or iPod touch - Apple Support