There's nothing suspicious about it, imho. macOS has been degrading in quality, Mac users are losing more and more control of the system while non-Mac laptops are getting better (Framework, Starlabs, System76, etc) and Windows is in total decay (dumping ads into the OS, forced Microsoft account, privacy nightmares, Microsoft security track record), all perfectly explaining the interest in more open alternatives. Omarchy just benefitted from the sponsoring company being already successful, the founders being well connected and experienced in marketing product launches.

I wish people were as critical in more relevant areas.