Did my buyer not receive the item? I’m confused why this is the only order out of the dozens i’ve sold with no tracking number provided?

I’m a newer seller, and this is really disappointing to me. I can’t find a tracking number either, and I lost the receipt. Should I just message my buyer can ask if they want a refund? This is super annoying and I knew as a seller i’d get into complications but this is really annoying.