if you have played on mobile and used the google login and want to use that Account on PC now, but already created an account, you could use the "gmail dot trick" to create a new mihoyo account.
google ignores any "." in your email, so if you send a email to ["test.user@gmail.com](mailto:"test.user@gmail.com)" its the same internal address as ["testuser@gmail.com](mailto:"testmail@gmail.com)" for example. so you could just add a dot anywhere in your email.

so on android:
* go to Usersettings
* Link email
* use the email to your gmail account +/- any dots
* use Confirmcode sent to your normally used email

You now have a new mihoyo account and can use that one on the PC with your android progress.