I want to send a message to the leader to tell him to hurry up. What should I say?

I feel that texting at work is not as respectful as calling or face-to-face communication.

This is called a follow-up reminder. It's normal at work. Don't be timid.

When reporting other work to the leader, you can say "Look, what should I do with XX I told you before …" and euphemistically express that this matter is urgent (for example, the deadline is approaching and the competent department is urging, etc. )

It is also feasible to talk to the leader directly or remind him by phone. Be polite, modest and cautious.

Note that you are asking about work, not personal matters. Be confident. But the tone of speech should be euphemistic and try to give the leader face.