I heard and read in reddit and GitHub about that UIDevice.current.identifierForVendor.uuidString is restricted according to privacy. Its better use DeviceCheck API or create my own UUID. So is it correct? If its so please can you share apple privacy update about this?
I can't comment on what you may have heard or read elsewhere, but identifierForVendor is a property you can use. It is not restricted, but may have some limitations depending on what it is you are trying to accomplish. It may or may not be "better" than alternatives, depending on what "better" means to you.
You may want to start by reading identifierForVendor to understand how it works and its limitations.
Argun Tekant / DTS Engineer / Core Technologies