This occasionally happens with my email folders too @harryandeileen1
I use an imap type email set up which relies on it syncing with your email servers.
I'm not 100% sure but I think this is why sometimes the folder is empty.
The emails are still there if you login to your main email login page online awaybfrom the email app.
🌈 Stay Safe 🌈
Daily Driver > Samsung Galaxy s²² Ultra 256Gb in Phantom Black.
The advice I offer is my own and does not represent Samsung’s position.
I'm here to help. " This is the way. "