Unfortunately there are no plans for a Mac version, I've personally stopped developing anything for Mac so it's not coming. Linux might be a possibility however. I think there are several ways to run either Windows or Linux apps on Mac, you're free to experiment with that.
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I would love to see a Linux port. Having something run natively rather than using a workaround is usually so much better. I understand that you usually pretty much need the hardware to distribute something for Apple products, but at least with Linux you can just spin up a virtual machine within Windows. SteamOS is Arch based (BTW) so a lot of us Linux gamers (and wannabe developers) are running Arch based distros on our PCs. If you don't have the time or there isn't enough interest, I also understand.
If you’re willing to give me (temporary?) access to the code for the launcher, I’d happily contribute a Python port which should run on any system which can run modern Python apps using Qt6.
Feel free to reach out here or send me an email (gmail) to my username! You guys have certainly provided a ton of value to my dev efforts, and it would be awesome to give back.