Running Cloudflare Warp for Teams on both Mac OS and iOS, I’ve installed and trusted the certificate on both devices and connection works for all domains (at least the ones I’ve tried) except those owned by Apple when using Safari.
I can visit www.apple.com and www.icloud.com on Chrome, although on Safari I get the error “This connection is not private”. When viewing the certificate the error is “www.apple.com, Gateway Intermediate ECC Certificate Authority, Cloudflare for Teams ECC Certificate Authority certificates do not meet pinning requirements”.
This also has the effect of being unable to login with Apple ID on any of the Apple apps.