How Experienced Salespeople Handle Silence After Sending a Proposal: Insights and Strategies

Quick research question for the sales people here. When you send a proposal to a prospect and they go quiet, what actually goes through your mind and what do you do while you wait. I am trying to understand how experienced salespeople manage that stage and what signals they actually rely on. Not pitching anything. Just listening. Would love to hear from people who have strong opinions on this. Comment below or DM me if you are open to a short async conversation.