First, "Apple Cash Sent" on a bank statement means money was sent from an Apple Cash account or Wallet, which is a debit-card funded transfer, not an App Store purchase, so it wouldn't appear in your purchase history. On your iPhone, open Wallet > Apple Cash card > the three-dot (...) menu and check the transaction list for a $33.80 payment, and check Messages for a Pay request. Also check whether a family member or another device uses the same card in Wallet.
If you didn't make it, contact your bank right away and tell them you want to dispute it. They can freeze the card and start a chargeback. Also change your Apple Account password (Settings > [your name] > Sign-In & Security) and make sure no unknown devices appear under your account. Apple's Apple Cash help is here: https://support.apple.com/apple-cash . Please don't post card or account numbers here.