number of selfie photos different after iPhone migration

I migrated from an phone 12 pro max to an iPhone 16 pro. Both phones are on iOS 18.0.1. I used the quick start method where you scan the orb. After migration, the count of *videos, live photos, and portrait photos* were exactly the same. However, the count for **selfies** was 3080 on the old phone and 2885 on the new phone. I also noticed that the "shared with you" section appears on the old phone but not the new phone. Though if I individually look for those photos I can find them. I visually compared the two folders for discrepancies. On the old phone, if someone sent an attachment in a message, and it was categorized as a selfie, it shows up in the selfies folder. I specifically looked for those images on the new phone. They still exist but are not being placed in the selfies folder. This makes me nervous that photos are not perfectly synced but is this maybe just a known bug in the way that photos are categorized? I would like to confirm that I'm still saving all photos from message attachments.