Hi all.
I add another question: under Dragonbane OGL I can create a supplement to Dragonbane. May this supplement be an alternative setting, with new kins, professions, etc?
Have you checked the pinned Dragonbane OGL thread over in the DB sub-forum? Might be a better place to ask, assuming it hasn't been asked already.
From my own reading of the Dragonbane license (and I'm no lawyer), it's a bit of a grey area but looks like it might be allowed, so long as you make sure you follow the terms in the license, especially section 2.
That said, while the language of the license is not clear on it, I don't think FL intended for the DB license to be used to make alternative settings, so I'd not risk it personally without an official answer.
I make YZE games (https://drivethrurpg.com/browse.php?author=Matt%20Kay) and produce predominately Free League content on my YouTube channel (https://youtube.com/@3skulls)