Headphones have their own volume level. Sometimes when listening, trying to increase or decrease the volume with the buttons on the headphones, their internal level changes, and not on the phone. But on some phones, the headphone buttons as usual adjust the level of the phone - here it also depends on the phone model. If the sound is hard to hear, and the phone is set to the maximum - hold down the button on the right ear and the "internal" sound will increase.
Black Huawei FreeBuds 3 Wireless Bluetooth Earbuds for Superior Sound
276 Review
Upgrade Your Music Experience with XiaoMi True Wireless Earphones 2 Basic - Longer Battery Life and Superior Sound Quality (White, International Edition)
341 Review
Upgrade Your Audio Experience with Samsung Galaxy Buds+ Plus: True Wireless Earbuds with Improved Battery and Call Quality in White, including Wireless Charging Case and Velvet Pouch.
320 Review
Headphones Sennheiser CX 300-II, black
318 Review
Black Panasonic RP-HJE125E-K Wired Earphones 🎧 with 3.5 mm Jack
359 Review
Purple Philips SHE3590PP/28 In-Ear Headphones - Superior SEO
189 Review
Bose QuietComfort 25 Acoustic Noise Cancelling Headphones with 3.5mm Wired Connection for Apple Devices - Black
43 Review
Panasonic RP-HS46 Slim Clip-Type Earphones in White: Quality Sound On-the-Go
76 Review