Honestly mobile ports/versions are just great for any game dev to look into, just look at Genshin lol
There are only 2 people I know of that ask for mobile ports
1. Non-adults. People who were given phones at a young age, but have no access to disposable income or privacy so they don't have their own laptops.
2. People from second world countries or less where laptop ownership is less common.
If the port-beggars are 1, then I laugh at you. If they're two, then I sympathize.
Is there any way to play the tougioh game on Android? I really want to get her.
Unity games aren't ported to android because in order to do that, you'd need to decompile the game, open it in Unity yourself, and use your own personal license to export it to android. Basically there's no framework to make the conversion.
The flash games are ported to android because there already exists a framework for wrapping flash files in a way that allows them to be played on Android.
The best way to get Android ports is to ask the developer of the games, JSK. Your voice has no power if you're not at the very least a supporter though, and it's best that you try to deliver your message in Japanese so he takes your interests seriously.
