Everyone has their own answer to this question. Those who have answered it, including myself, will always tell you focus on 1 maximum 2 channels and rinse them out of attention until you move on to the next.
What people always forget to mention is how much time, experimentation and discovery it takes to find your channel and your strategy. There are so many options nowadays, founders feel overwhelmed on where to start Reel Content, UGC, AI UGC, Cold Email, Linked Posts, Twitter, Reddit, Ads, Youtube etc... Within each channel, there are also plenty of strategies. Seasoned founders, lets help early founders self-promoting here find their way, even if its just one step in the right direction