Stuck in a boring job for now? Get strangely good at it. Skill built anywhere is portable.

Competence transfers even when the specific task does not. Learning to be accurate, fast and dependable in a dull setting builds something you take with you, and the habits formed there will show up in work you care about. Waiting for interesting work before you start trying is a way of arriving at the good job without the capacity to do it.

Treat the current role as practice rather than a sentence. Find the part of it that can be done unusually well and do that. The boredom is real, and the skill you build inside it is also real.