Lost iPhone not connected under deceives in Apple ID anymore but still showing on find my??

Changing your Apple ID password removes all previously connected devices from your account. This is a security measure to prevent someone who might have your old password from accessing your devices.

Can you still track and erase?

• It depends. If your iPhone is currently powered on and connected to the internet, then yes:
• You should still be able to see its location and perform actions like Lost Mode or Erase through Find My. It may not appear under devices as all the devices that used the Apple ID where the password was chaged is logged out automatically.
• However, if the iPhone is turned off or offline, the actions won't be triggered until it reconnects.

In essence, changing the password doesn't necessarily sever the Find My connection. It just disconnects devices from the standard Apple ID device list for security reasons.

This may help --> Do's and Don'ts for lost iPhones - Switch… - Apple Community