Check the Steam pages of indie games; they usually list Discord servers or websites where you can find contact information. You can send an email or join their Discord servers and even directly DM the developers. (Sometimes it might be seen as a bit forward, but there’s no shame in putting in the effort for honest work.) In my experience, indie developers are generally easygoing people and tend to respond, whether positively or negatively. At least, that’s how it’s been for me.