@Vinod Survase, Thanks for posting in Q&A. Based on my researching, under Autopilot new feature, I didn't find this change.
https://video2.skills-academy.com/en-us/autopilot/windows-autopilot-whats-new
Based as I know, if the device is removed from Autopilot, Intune, and Azure AD, it should not appear in Autopilot anymore. If you manual remove the Autopilot device, but the device still shows Autopilot after Azure AD join. I think this can be the device has not deleted completely. You can open case to check.
For the device ownership, it can be Personal or Corporate. For " if we give the ownership from company to those users", did you mean you change the primary user of the device? If yes, then the device will not be removed in Intune or Autopilot. It only changes the primary user who use the device. To delete Autopilot device, you can follow the steps in the following link:
https://www.prajwaldesai.com/delete-windows-autopilot-device-intune-entra/
Note: Non-Microsoft link, just for the reference.
For your scenario, you can also consider Autopilot reset to takes the device back to a business-ready state, allowing the next user to sign in and get productive quickly and simply.
https://video2.skills-academy.com/en-us/autopilot/windows-autopilot-reset
Hope the above information can help.
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