Oh I thought maybe the phone is still linked to the friend via her google acc that she used to set up the phone - if yes, it would show up in her list of managed devices if she logs into her google acc using web browser even if a diff acc is running the phone . And through google storage/cloud backup or activity history etc (what's the current backup account now set in android?) - app data would sync and she'd get a copy? Maybe was just guessing
NO clue ... the card in Gpay / Wallet is linked to the account you're signed into and active / current (as you can have several accounts). If that account does not exist on your friends phone - no clue how your card or linked data shows up on her wallet / google acct.
If you deleted your friends account before adding your account and info on the phone - again no clue how it could have gotten into her phone.
I assume this is an Android device. No clue how iOS syncs info across devices.
Told her to login to her Google Pay and she deleted my address and credit card.
Thank you everyone!