Should I be persistent or move on after a great informational call?

I feel a bit silly asking this, but I'm unsure about how to proceed after a great informational call. Two months ago, I had an excellent call with a VP in a coverage group at a bulge bracket bank. For context, I'm a class of '23 graduate, currently in a non-IB finance role.

The call was scheduled for 30 minutes but lasted an hour. We connected over our shared experiences as immigrants, similar college backgrounds, and common hobbies. After the call, I sent a thank-you email. Earlier this week (on Monday), I emailed him again asking if he had time for a mock interview and prep session since he recommend we do that as we get closer to summer. So far, I haven't received a response. I know it's been a busy week with mid week holiday. He mentioned that his group is planning on hiring an analyst at the end of the summer which is also why i waited for 2 months before i did.

I'm typically persistent, which is how I initially got him to respond and set up the call. He was helpful during our conversation and provided good advice. I can see from my email tracker that he opened my latest email once but hasn't replied.

My questions are: What's an appropriate time to follow up? Should I continue being persistent or move on? Where do you draw the line between being appropriately persistent and pushy in networking situations like this?

I understand that people in banking are busy, and I don't expect them to owe me anything. However, I've read about the importance of persistence in networking and everyone i get on a call with say the same thing so what should i do?

Any advice would be greatly appreciated!