Fair warning up front: I'm a man who worked in the trades, so I can't speak to your experience from the inside — take this as one perspective, not expertise.
From where I stood, though, trust was built the same way by everyone: show up when you said you would, be able to do the work, communicate clearly, and handle problems without drama. I spent twelve years as a commercial electrician before starting my lawn care company, and that formula never changed regardless of who was applying it. Clients trust competence they can watch in action.
If that's true, it's good news. It means there's no special puzzle you have to solve that the rest of us didn't. Be visibly good at the work, run your business professionally, and the trust follows.
