BIG-IP System Preferences

For a new cluster, create a cipher rule and group and enable TLS 1.3. Current:

Cipher Suites:  DEFAULT:!DHE:!RSA:!SHA:!ECDHE_ECDSA:@STRENGTH

DH Groups: X25519:P256:P384:X25519MLKEM768:DEFAULT

I don't understand why this is not the default.