Lack of (or insufficient) self-advocacy can be a form of self-obstruction, seeing doors as locked when they are unlocked, or self-sabotage, misperceiving self-worth, not speaking up, understating self-worth.
Such harms may spill into shared works and relationships, under-advocacy and under-appreciation of partners, friends, teammates, co-workers, communities.
These connections can work both ways. Advocacy strengthening advocacy. Worth to worth.