Hi kangistan,
Depending on how your passwords are being stored, there may be different methods to removing them.
On a Mac, this information is stored in Keychain. You may manually edit the stored Keychain information by following the steps from Delete a keychain in Keychain Access on Mac:
"Delete a keychain
- In the Keychain Access app on your Mac, if your keychains aren’t visible, choose Window > Keychain Access.
- Select a keychain in the Keychains list.
- Choose File > Delete Keychain [keychain name].
- Click Delete References."
If you use iCloud Keychain, which syncs Keychain elements across your devices, the process is different. Per Remove a passkey or password from your Mac and iCloud Keychain to remove those elements on a Mac:
"On your Mac, choose Apple menu > System Settings, then click Passwords in the sidebar. (You may need to scroll down.)
Click the Info button for the website.
Click Edit.
Click Delete Password or Delete Passkey.
Click Delete Password or Delete Passkey (again)."
On your iPhone, use How to find saved passwords and passkeys on your iPhone. You can also disable that feature entirely on iPhone by going to Settings - [Your name] - iCloud - Passwords and Keychain with iOS 16.
Regards.