Hi! Thanks for your kind words.
For Hive Time, I am specifically committed to (among other things) only distributing the game via storefronts that offer a pay-what-you-want model.
For my free/Free projects, I think I'd rather work with downstream package maintainers within the distro communities that my players are a part of so that experiences can be tailored to those suit those users' distros. Flathub is not for me.
I think it's important to recognise here that the Itch app is a package management platform itself, and nesting package managers within package managers seems both disruptive and counterproductive (see the hurdles and conflicts that can come from language-specific package managers).
Note that historically, Itch have historically been open to distributing their app through other game distribution platforms, so maybe that's something that might happen.