I wouldn't hold my breath. The iOS Mail app can not negotiate any TLS version above 1.0 (for IMAP, possibly SMTP too) even though it obviously supports TLS 1.2 because it sends a TLS version of 1.0 in the ClientHello message even though that same message will contain TLS 1.2 ciphers (AES-GCM).

I reported it in October and Apple's security team replied they're aware of it but it's still not fixed 2 releases later even though they probably need to fix like 1 line of code (the advertised version flag).