except crypto twitter
Depends at what stage you're trying to find.
If it's pre TGE around the seed funding phase. Find it in rootdata or cryptoranks. They got comprehensive data about that.
If what you're looking for is their listing or at least before they went live with their listing. Just see exchange's listing announcements on their blog posts.
I agree that so far, Cryptoranks has been a great place for me to find projects with a more promising foundation. There's also the option of hunting, and I think researching VCs is also a key consideration. But again, that alone isn't enough, as each project has its own set of requirements to be eligible for its TGE allocation, such as being a contributor.