@DJFliX has driver for this device in his channel. Here’s the link SmartThings. Add a little smartness to your things..
Enroll to the channel and install driver. Remove device first. Then go to add device, scan nearby and put button to pair mode. If not found just keep trying and trying. Eventually it should be found.
What come to releasing and pressing I’m not 100% sure because I only use it as a single press button.