Probably because it was a private company prior to the merger.
It is a really new company that came into this world in 2022, I took these 2 lines from an SEC filing:
Real Messenger (Nasdaq: RMSG and RMSGW) is a real estate technology platform headquartered in Costa Mesa, CA. Founded in 2022, Real Messenger is transforming real estate engagement by connecting agents, buyers, sellers, and other industry participants within a unified, social platform. With users across 35 countries, Real Messenger’s primary reach is in the U.S., with notable growth in key markets such as the U.K. and Australia.
With over 1 million users, Real Messenger is building a vibrant global community, creating a dynamic space for real estate connections, insights, and experiences. In recognition of its impact, Real Messenger was named to the 2023 HousingWire Tech 100 list, and its CEO, Thomas Ma, was honored in Inman’s “Best of Proptech” awards in 2023.