Can stolen iphone be accessed if you put credentials in scam link

Hi, thank you for reaching out to Apple Support Community.

Please refer to this article: Recognize and avoid phishing messages, phony support calls, and other scams - Apple Support. This also provides instructions on how to protect yourself and your Apple devices.

Additionally, contact Apple Support immediately at https://getsupport.apple.com or through the Apple Store app.

If they have access to your physical phone, you may be in danger of having your data stolen, so immediately remove Apple ID access to your iPhone and reset your Apple ID password.

I hope you are able to get this issue resolved, please have a great day and a happy new year!

Of course. Presuming that you gave them access to the device anything on the phone is theirs to do with as they please. Might be time to change all of your passwords for all accounts (and enable two-factor authentication), ensure that you have your photos elsewhere, etc.

See If you think your Apple ID has been compromised - Apple Support

Also, if you can access your iPhone through Find My, and you believe data stored on your phone is at risk, I would strongly recommend erasing the device through Find My. Refer to this article for instructions: Erase a device in Find Devices on iCloud.com - Apple Support.