I do cold outreach across a few channels (X, Discord, Indie Hackers). I built a lead gen system for my target customer, so I don't have to spend too much time searching. My initial reach out offers high value for 0 upfront effort. When they engage, I provide value and they are happy. At that point, most are willing to engage with your product further.
Btw, I can do a live video review of [redacted] with honest feedback and reactions. Let me know if this sounds useful.