I should disclaim that I haven’t personally proven this out, but it’s advice I’ve often seen and what I plan on doing myself.
Personally I have a static site, and when I make a new post it automatically goes out to Mastodon and Medium as well as a couple of "RSS aggregators" (like https://diff.blog/), as well as a dedicated subreddit as my "comments section". Then depending on the content I will often publish to dev.to (which automatically imports from RSS so it is mostly deleting the <style> block that it doesn't understand and hitting publish) and maybe Hacker News or Lobste.rs (although that is basically never, I generally prefer for others to share if they like the post).
But that is my over-complicated setup. At the end of the day I think what matters is own your content. Ideally with a feed on a domain that you control then spread elsewhere as it makes sense.