This is often the case with over-ear headphones.
Wired audio doesn't support absolute volume control. To ensure maximum output on the headphones, the wired audio default volume is set to 100%. After connecting with a wired cable, you need to manually adjust the volume to a comfortable level.
Bluetooth audio supports absolute volume control, allowing quicker volume adjustments, so its default volume is set around 50%. You can also adjust the volume using the headphones’ roller or the device’s volume buttons to adjust to your preferred level.