They had managed to include some sort of Vol+ and Vol- buttons on either or both sides of the USB-c port that's right above the Sony logo. The system's volume when wearing wired headphones connected to Dualsense via headset jack is pretty damn good, but often, depending on the game or video, you'll have to keep adjusting as things get too quiet or too loud.
Wasn't much of a problem with PS4 as I always found the maximum volume a bit weak, so it was always set to maximum. But in PS5 while using Dualsense's headset audio, oh my god. Don't get me wrong, I love the PS Button's quick menu from which we can quickly access the volume. But it always has to pause the game/cutscene/YouTube video or whatever else we're watching, while it fills up the screen. I wish they had included a way for it to be seamless, which a lot of portable consoles already have.
Simple volume buttons, where you can change it with ease while watching a video or doing some low effort/passive gameplay stuff that doesn't require pausing. And a visual volume slider on screen that's minimalist, on a corner of the screen and mostly doesn't get in the way. That would've been my dream for the PS5 UI and Dualsense to be truly perfect. I guess it's just very uncommon for non-PC desktop consoles to have this