Is fixing your microbiome all hype? Why don't I hear more talk about it?

I've been trying to fix my microbiome for the last six months, with mixed results. I have no idea if I should keep trying or if this is a waste of money and hope. I don't have a lot of strictly digestive symptoms so who knows if I am barking up the wrong tree. I guess what makes it such an attractive approach is that this is testing we can order ourselves as often as we want, and there are a lot of targeted prebiotics, probiotics, and other foods that we can use to improve specific levels. It feels distinct from the "throwing spaghetti at a wall" approach of taking random vitamins, and from the "begging the doctor to run X test only for it to come back normal" approach.

I feel like outside of the r/Longcovidgutdysbiosis subreddit I hear next to no talk about this. Is it overhyped, underhyped?