Why don't USA airports have international transit areas to wait for ongoing international flghts?

If you arrive at US airport on an international flight and are making a connection to an ongoing international flight why is there no international tr

If you arrive at US airport on an international flight and are making a connection to an ongoing international flight why is there no international transit lounge, thus precluding having to go through US Customs Immigration and TSA security check.

or:If you arrive at US airport on an international flight and are making a connection to an ongoing international flight why is there no international transit lounge, thus precluding having to go through US Customs Immigration and TSA security check.

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