A Commonwealth carrier strike group in the Pacific

Is the idea of a Commonwealth carrier strike group dead?

No; a Pacific group combining British, Australian, Canadian, and possibly New Zealand forces would still make sense.

A Commonwealth carrier strike group remains strategically sensible. Pacific operations provide the most plausible setting for such a formation. Britain could supply the carrier core while Australia and Canada contributed escorts, personnel, or other available capabilities. New Zealand might also participate, leaving the group to pool what each navy could sustain rather than requiring identical fleets.