I can take my inreach mini underwater up to 50 meters with the official accessory dive case (I bottom out at 45). Short of making a custom case I can't do that

I can take my inreach mini underwater up to 50 meters with the official accessory dive case (I bottom out at 45). Short of making a custom case I can't do that with a cell phone and I'm not sure it's rugged enough to take even small waves.