Please consider this post as a feature request: forums.plex.tv/discussion/207633/feature-request-volume-control-via-volume-buttons-on-iphone-ipad I am reposting this for better visibility.

[Feature Request] Remote volume control via volume buttons on iPhone/iPad

tom80H Archived June 26, 2021, 9:03pm 2

2021 clean-up: duplicate

Topic		Replies	Views
Minimal GUI for hardware volume buttons Feature Suggestions ios-legacy	6	335	August 9, 2021
+/- Volume Buttons Feature Suggestions	1	80	June 26, 2021
No volume slider in iOS App music player on iPhone X Mobile Devices ios-legacy	61	1758	April 17, 2020
On Screen Volume Control Android Feature Suggestions	1	81	August 9, 2021
iPhone volume hardware buttons to manage TV volume Feature Suggestions	1	69	August 9, 2021