The only BT in ear set I could use on a acceptable minimum volume is the JBL Tune125BT. It has it’s own volume knobs and can be lowered to a level which doesn’t damage my ears.
I have another true wireless BT set, the JBL 125TWS. This set is a true wireless without any volume knobs. Lowest volume is a disasterous level for my hearing.
The last set of BT headphones I tested is the JBL 600BT NC. A great headset but also schredding my hearing on lowest volume setting.
Tested too:
earpods with lightning connector: perfect to manage to acceptable minimal volume, sound Q is dreadfull.
Apple DAC USB C to 3,5mm stereo and Sony MDR-V500 on iPpro 2018: perfect to manage acceptable minimal volume.
Apple DAC lightning to 3,5mm stereo and JBL cheapy wired in ear set: perfect to manage acceptable minimal volume.