Is Community Launch Still an Effective Way to Launch a B2C Startup?

I'm curious. I've heard about the types of launches but everything I have done seems not to be fruitful. Even the one that should have been the most effective (community launch) seems not to work, as Admins and Moderators of groups/communities won't allow you make even a mild talk about what you've built for the community members to benefit of.

What about "hand-recruiting?" It seems not to be a viable option for B2C, am I right? Because, cold messages on Twitter/X and other platforms are not even viewed nor replied to.

Please, what do you think is the best approach to launch a B2C product?

I'll be reading all your comments. Thanks.