After briefly mentioning which devices will be affected (the Apple TV generation 2 and generation 3), Netflix says “Unfortunately, we’re sunsetting support for these devices on Jul 31 ...

One has an HDMI 2.1 port and a port for the power supply ... receiver for connecting to the Siri Remote. The third-generation Apple TV 4K is equipped with an faster A15 Bionic chip.

Repeat steps 2 to 4. Again, if none of these steps help, your Apple remote might be defective. A new one can be ordered online or purchased at an Apple Store. The 2nd-gen Apple TV came out in 2010 ...

Bloomberg's Mark Gurman recently said Apple is planning to release new HomePod mini and Apple TV models this year.