I know if I tap the trackpad while viewing content I will see a display at the bottom of the image showing time viewed and time remaining.
I don’t know if the following is new in 13.3 or just something I stumbled upon for the first time…
If I tap a second time before the display goes away the display changes to the current time and the time the content will end (end of program, whatever).
So far that’s all I’ve noticed in 13.3 that I had not seen before.
Are you replying to the post about time data in tvOS 13.3? I’m pretty sure that the behavior where one tap gives you total time and time remaining then double tap gives your clock time, has been around for quite a while. I’ve been using it for at least a year.