Creating a Time-Based Funnel Filter for Image Search Tracking

Hi all – need help with a time-based funnel filter! I’m trying to create a funnel with the following logic for our app: Goal: Track users who did an image search in their first 3 days after signup, and then opened the app again between Day 4–7. Here’s what I’ve set up so far:

Challenge: I want to limit Step 1 to image searches done within 3 days of signup (or first app open), and Step 2 to only count app opens that happen between Day 4–7. I can’t find a way to express those relative time filters based on the user’s first event. Mixpanel doesn’t seem to support “Time since first app_opened” or “days since signup” directly in funnel filters. Has anyone figured out a way to do this? Maybe via session numbers, custom properties, or a workaround?