Happy for the insight!
I think it's not just about the writing style that affects engagement, but a couple of other things:
The community itself, if it wants to be called a community, should by nature communicate more with each other by commenting and exploring each other's content, rather than just posting then replying to people on their own.
I think it's also a good idea to do this across communities. For example if you do biology posts, you can start commenting and engaging in nature-based communities, or photography. The more people treat this platform like something that is social, the more engagement will happen. We can't just write content and expect people to find it if they're not actively looking for it!