How do people actually make big jumps in IT roles?

I’m trying to understand how people move up into better roles when they don’t fully match the job description. For context, I’m currently working as a Desktop Engineer, but my day-to-day involves a lot more than just basic support — things like Azure AD, Intune, M365 admin, device deployments, and being involved in rollout projects. I’ve been looking at roles like IT Project Engineer / Infrastructure Engineer, and I’d say I match maybe 70–80% of what they’re asking for. There are always a few ar