Outbound Static IP with Cloudflare Teams?

We have a SaaS app has the ability to block logins that are not coming from a specific IP address. It’s still doing proper auth/2FA after that.

Does anyone know if Cloudflare Teams can be configured to have everyone’s traffic out coming from one IP, so that we can block anyone from logging in to the app who’s not on Cloudflare Teams VPN?

You may want to look into device postures.
https://developers.cloudflare.com/cloudflare-one/identity/devices/require-warp