Using access with SaaS Apps

I have some third-party SaaS apps that support IP whitelisting to control access, but I don;t always have access to a static IP. Is there a way to setup and authenticate from any IP to Cloudflare Access and have it proxy my web traffic so it comes from a predetermined IP or group of IPs I could whitelist?

In theory I could setup my own proxy behind access but I am wondering if Access doesn’t have the ability to do that for me.

No, this is not a feature of CF access.