When a radio button is both checked and disabled tabindex wouldn't step into the radio group at all

[edenBenovadia]

Reproduction

Use StackBlitz to reproduce your issue: https://stackblitz.com/edit/angular-material-radio-button-demo-wz3p6o?file=app%2Fapp.component.html

Steps to reproduce:

1. Have a radio button which is both checked and disabled
2. try to navigate to radio group through tab

Expected Behavior

If checked radio button is also disabled the tab should navigate you to the first enabled radio button (even if is not checked)

Actual Behavior

If checked radio button is also disabled radio group is not navigable through keyboard

• Angular:

[edenBenovadia]

Hey is there any updates with the issue?

[zarend]

Confirming that I can reproduce. Reproduced in local dev environment.

• reproduced using example in docs(material/radio): add example of radio that is both disabled and #26248
• macos 12.6.1 (21G217)
• Chrome Version 108.0.5359.98 (Official Build) (x86_64)