Can anybody pinch-zoom a PDF document using external touchpad/trackpad on an Android TV box?

Android doesn't seem to support external touchpad (usb or wireless) pinch gesture for zooming in and out? I tried a few external wireless keyboards with touchpads built-in, while the touchpad works for pinch on Mac and Windows, it didn't work for pinch-zooming on Android. So my guess it's not possible. I use my Android TV box (BuzzTV box, Android 9) as an Android desktop for apps e.g. PDF reader. Also tried using normal mouse, scroll wheel and ALT or CTRL or whatever combination it is typically.. I understand Android 14 has support for external keyboards but I don't see mentioned whether it also provides pinch zoom gestures for external touchpads. Not planning to upgrade the TV box yet. To solve the external keyboard compatibility, there is an app called External Keyboard Helper for Android. That solves the keyboard issue. But I can't find anything similar that would allow me to use pinch/zoom on external touchpad. Some apps have support for keyboard shortcuts (Alt+leftButton+arrowRight/arrowLeft works for me), but most apps do not support this. The issue is not related to this specific tv box. I tried other brands TV boxes and it is the same problem. Is it a universal Android limitation? UPDATE: Here I found some answer.. But I am still looking for a way to pinch zoom a PDF. So I guess my question needs to be - is there any app for PDF that supports pinch and zoom natively on non-touchscreen pointing interfaces? https://android.stackexchange.com/questions/82062/how-to-pinch-zoom-on-device-with-no-touchscreen-like-an-android-stick