Apple might do an Authorization Hold to check if the card can be used for such subscription payments at all. After that clears, the ‘charge’ should be undone/reversed.
See your purchase history for any items that are actually billed to your Apple ID account, including subscriptions.
If you don’t recognize the charge as one of the above, then read on here: If you see 'itunes.com/bill' or an unfamiliar charge on your statement - Apple Support