For Mosyle, use the Multi-cert Profile capabilities.

To enable it, go to Management > Activate New Profile Type > Multi-Cert Profile > Activate.

Once activated, you may select "Add new profile".

Create the SCEP profile first, then create the WiFi profile.

On the WiFi profile, use the SCEP certificate as the identity certificate.
In the "Trust" section, upload your server certificate.

Here is Mosyle's support documentation on multi-cert profiles: