Greetings,
I prefer linux for most of my VN/Semi-smutty gaming and it looks like this is built in a flexible engine that can do linux builds.
Is it a matter of "We tried and it broke horribly [or had terrible performance] and there wasn't enough Linux users and they probably have another device" or "We thought about it but nobody had any Linux machines to test on".
If it's the latter, I'll be happy to try a linux-build demo, test to see if there are any issues, and then buy an itch download and show the receipt to get a linux port of the full game and test that too.
Cheers, and thanks in advance.