If you feel invisible online, it's tempting to blame yourself. You're not boring. Your strategy is. There's a difference, and the good news is that the second one is very fixable.
Sameness is the real problem
Most brands in any industry say the exact same things in the exact same way. When everyone sounds identical, the audience tunes all of it out. Standing out isn't about being louder, it's about being clearer and a little braver.
Have an actual point of view
The brands that win say something. They take a position, they have opinions, they're not afraid to not be for everyone. That's what makes a person stop and think, finally, someone gets it.
You don't need to post more to fix this. You need to sound like you, on purpose, in a way nobody else can copy. That's the whole game.