I would like to see my bills statement

If you mean for cards in the Apple Wallet you can find statements on the card issuer’s website. Specifically for Apple Card you can open the Wallet, tap on the Apple Card, then Card Balance.

Do you mean:

• How much you own on your extended purchase of an iPhone? That will be in your credit card statement from your bank.
• If it is specifically an Apple card open the Wallet, tap on the card, then Card Balance, then Installment Balance.
• If you have more than one extended payment plan tap on the circle with 3 dots at the top right and tap Monthly Installments
• If you mean the total balance on an Apple card that will be shown after the first item above

I’m trying to see where my balance is on my statement for my phone