Literally impossible to enforce. Any business worth a damn uses vpns. Blocking such would be bad for business. Also, ssl vpns are as far as I'm aware, indistinguishable from regular https traffic.
They'll ban the known IPs of any well known VPN provider. It'll not really affect 90% of VPN users that are tech literate, but the 80% of the People that are Tech illiterate shall be punished and the Politicians shall pretend it works. This is how all the Countries blocking VPNs do it now.
Nah it's far more stupid than that. They want to ban some (most?) VPN apps from the iOS and Android stores. You would still be able to sign up for any VPN from your browser, and manually set it up on your phone.
That's the current proposal anyway, soon they'll understand how moronic it is and either double down and try to "fix" if or quietly drop it.