Seems to be supported by RTL_433 as:
[215] Emax W6, rebrand Altronics x7063/4, Optex 990040/50/51, Orium 13093/13123, Infactory FWS-1200, Newentor Q9, Otio 810025, Protmex PT3390A, Jula Marquant 014331/32, Weather Station or temperature/humidity sensor
It uses FSK modulation which is not supported out of the box with OpenMQTTGateway with v1.6.0
Nevertheless, if you are open to tinkering and building your own firmware, you can do it as done below:
If not a further version of OMG will support FSK out of the box