Haha I'm still on the fence for a discord.
As far as apk, hoping to spend some time on developing one for next update, but depends on the pace of the development.
There is an unofficial version from an known android port discord on my novel's f95zone thread (page 10 from estrada). I downloaded it and it looks pretty solid, but of course that's up to you as I didn't officially make it.
Discord isn’t something to worry too much about — it doesn’t need to be perfect, and not having one won’t cause any serious problems. However, having a Discord server can make it easier for players to report issues, find fixes, and have a community space to interact. It can also help spread word of mouth about your game, and it’s free and relatively easy to set up.
For your type of game, I’d recommend setting some limits in the general chat and creating a separate, unrestricted adult chat. Modern chatbots can handle most moderation needs, but simply disabling photos and links in the general chat while allowing more freedom in the adult chat should work well.
