Yes you need to talk it over with him- maybe he is hoping that as a volunteer he will receive vaccine quicker?- and that he can get you one if theres any leftover at end of day, as some have said? Which, as a general idea, would be to your advantage, but if its not a certainty, then he may need to think it over more?
How to Keep Living at Home Longer
When a political leader lies on their CV - can you trust them?

