It’s likely you interviewed for a specific set of tasks and duties, and that these same expectations were reviewed after you took the job. You may notice, however, that the longer you spend in the position, the more you observe inefficiencies — perhaps even inequalities — in your workplace.
“It’s not my job,” is a feeble excuse for standing by when you could be stepping up. Caring often isn’t written explicitly on your contract, but caring is exactly what you should do if you want the next salary bump…and if you want to be a better human.