I love how an experiment turned into something much bigger than you originally planned. The openness behind Open Doctrines is a great part of its identity, especially with you sharing the development process and being honest about what still needs work.
I think TikTok, X, and Reddit could help you reach more strategy game fans beyond the people already finding you through itch.io and Discord. TikTok could showcase interesting gameplay mechanics in short clips, X could help you share development updates and connect with strategy game communities, and Reddit could bring valuable discussions when you share relevant mechanics, design decisions, or development challenges in the right communities.
I do offer video edtition and scoial media management,I helps games reach the right audiences through content and community engagement, and I can see opportunities to build on what you're already doing without losing the open, experimental spirit of the project. Have you considered having someone help you manage that side of things while you focus on developing the game?