IPad Pro Wifi drops as soon as its connected to. No Wifi Icon.

Start here:

If your iPhone, iPad, or iPod touch won’t connect to a Wi-Fi network - Apple Support

…and here:

Recommended settings for Wi-Fi routers and access points - Apple Support

Clearly, in your particular situation, you may have no control over the presumed to be Enterprise WiFi network to which you are attempting to connect. Assuming that the WiFi network has been appropriately set-up set-up, WiFi and Internet connection difficulties are usually an indication that your device does not have a routable IP Address - your IP Address usually being assigned by DHCP. When this occurs, your iPad may only have a self-assigned link-local IP address that begins 169.254.x.x.

If you have a VPN App or profiles installed, or a security App such as Norton, these may be interfering with DHCP and preventing your device from obtaining a valid IP Address for the WiFi network to which you are attempting to connect. The resolution is usually simple; if installed, you may only need to temporarily disable or remove the Security App and/or VPN.

DHCP is frequently used to automatically obtain an IP Address. Until your iPad has a valid IP Address to connect to your network, you will not have an internet connection. Disabling or removing VPN and/or the offending security App should allow DHCP to operate normally - allowing connection to your network and the internet.

If this resolves your issue, the VPN and/or security App can be reinstated after the connectivity problem has been resolved.

The explanation concerns how the “network stack” operates - and is potentially beyond the immediate scope of this discussion.

As already outlined, your VPN should only need to be temporarily disabled in order to clear the issue. Once resolved, you can continue using your VPN connection if required.