I can’t sign in my apple Store

'If you can't connect or sign in to iCloud', click here --> https://support.apple.com/HT203512

For official Apple Support click here --> https://support.apple.com/choose-country-region Select your country, then a product. If you don't see one that handles your issue then keep experimenting with selections until you reach one that gets you a chat session or a telephone call and get the representative to redirect you.

or:

Contact Apple for support and service --> "See a list of Apple phone numbers around the world."

Click here --> https://support.apple.com/HT201232

VPN prevented sign-in --> https://discussions.apple.com/thread/253164691