The sensor’s 7-bit slave address defaults to 0101001b on power-up. It can be changed to any other value by writing one of the device configuration registers, but the new address only applies until the sensor is reset or powered off. ST provides an application note (196k pdf) that describes how to use multiple VL53L0X sensors on the same I²C bus by individually bringing each sensor out of reset and assigning it a unique address.
This is the main 2.6*V to 5.5*V power supply connection. The SCL and SDA level shifters pull the I²C lines high to this level.
Important note: This product might ship with a protective liner covering the sensor IC. The liner must be removed for proper sensing performance.