According to this Wiki article, the threshold for detecting lip sync issues is anywhere from +15ms -45ms to +145ms -125 ms.

https://en.wikipedia.org/wiki/Audio-to-video_synchronization

Even wired headphones can have latency of 10ms. I'd keep the receipt just in case it doesn't work out. There's some migration solutions, like don't watch your smartphone screen from a hundred feet away. smile

https://www.headphonesty.com/2020/07/fix-sound-delay-bluetooth-headphones/

Author of "Status 101: How To Keep Up In A World That Keeps Score While Buying Into Buying Less"