The previous icon was an Apple logo next to the word "TV", the mark used by Apple for its Apple TV decoders. The new logo looks like the Apple TV Remote, which makes its function clearer.
Today's redesigned logo matches the updated logo of the Apple TV Remote option in the Control Center on iOS devices. Apple has also changed this icon from the Apple TV customization to a remote control design in the iOS 12.2 update.
iOS 12.2 also made other changes to the Remote Control option on the iPhone and iPad, introducing a darker, simpler design and taking the majority of the interface from the iPhone. With a full Apple TV Remote control available in the Control Center on modern devices, there is no reason to download the standalone software. Apple TV Remote application.
However, Apple still keeps it and, according to current release notes, version 2.2 brings "general performance and stability improvements" with the new application icon.
the Apple TV The remote application can be downloaded for free from the App Store. [Direct Link]