I’m going to guess that you don’t work in tech, because good luck accomplishing that.
The overwhelming majority of businesses that allow remote work do so via VPN. It’s possible for some companies to get away with just Office 365 and some basic collaboration tools, but not for most. Some businesses even set up secure VPN tunnels between sections of their network and a section belonging to a contracted partner, software vendor, data processing firm, auditors, etc.
So banning is absurdly unlikely. But let’s say they do, or they restrict “allowed” VPN through government approved VPN software or something.
There are countless ways to hide VPN traffic as other legitimate/normal web traffic. Plenty of people in war torn areas, reporting from countries with locked down internet, and other similar scenarios have effectively proven that you can’t completely lock things down.
So they could ban it, but that’s absurdly unlikely, and even if they do there will be plenty of relatively safe ways around it.