I always check the projects through other projects, whether they have been followed on Twitter, or any other means of social media by verified projects, For example, if some projects are followed by Coinmarketcap, Binance, Kucoin, and some other top accounts, so I think about these projects. So, this is also a way to look over.
But that's not enough, there are communities of projects that have been made with fake followers though I think you know what I mean and they're easy to be figured out.
If there's not that much interaction on that project then that only means that they're not real followers and probably used a following service from any third party to make it look like they have a lot of followers.
And the engagement isn't there because you see little active people to none.