How do I track if my social media manager is really working hard?

I recently hired a social media manager on Upwork. However, I don’t feel like my Instagram account has much engagement.

She said she has spent around 4 and a half hours doing engagement in the past 5 days and I did see she followed some people as well as leaving some comments. But I don’t really think if she has worked for 4 and a half hours, the engagement would be this low. She also followed some people with like 200 followers and commented in their posts. I don’t see the point of doing this. However, without evidence, I can’t say she is not working hard or lying.

Is there any ways to track if my social media manager is really working hard?