Why not? How else do you get these skills without doing it?
Generally you don't put those skills in a Junior PD, but you would expect a Junior to take on these tasks if they hope to progress. The Mid level PD would have it listed and as the junior shows they can meet each and every additional skill, the option of a promotion becomes available.
When I was a junior I was allowed and given free reign to design the test system for the product and implement a design system for the frontend team.
Junior doesn't mean stupid, it just means less experience. How else do you expect people to gain experience if you don't give them basic independent projects?