According to the South China Morning Post

The new Aukus security alliance formed by the United States, Britain
and Australia has left France frustrated at being left out, prompting
concerns over the impact on Washington’s commitment to form stronger
ties with allies in confronting China.

France – which had its submarine deal with Australia halted as
Canberra announced on Thursday it was joining Washington and London in
the new alliance – described it as a regrettable move that would push
Europe to be more autonomous in its strategic planning.

“The American choice to exclude a European ally and partner such as
France from a structuring partnership with Australia, at a time when
we are facing unprecedented challenges in the Indo-Pacific region,
whether in terms of our values or in terms of respect for
multilateralism based on the rule of law, shows a lack of coherence
that France can only note and regret,” French Foreign Minister
Jean-Yves Le Drian and Armed Forces Minister Florence Parly said in a
joint statement.

Why would the U.S. exclude Europe out of the new Indo-Pacific security alliance? Is this because Europe is geographically far from the Indo-Pacific? I am wondering if it is really the case, because not too long ago, Britain sent a aircraft carrier to the South China Sea. Is there a reason for Biden to not include Europe in this new alliance?

According to the BBC:

China has warned the UK's Carrier Strike Group, led by the aircraft
carrier HMS Queen Elizabeth not to carry out any "improper acts" as it
enters the contested South China Sea.