La Presidente of Mexico is a Mexican Jew. So she knows how to negotiate, as Americans don't. I don't fault her for that. Refusing a flight before negotiations even start is a power move by an opponent that knows that she is in a much weaker position. Whatever consessions she gets, she will Trumpet in her next election.
Donald Trump is the exception to Americans not knowing how to negotiate. He will make an offer that allows her to save face, probably some token compensation accompanied by much public praise* and coupled with a not-so-subtle threat if she doesn't agree.
*He used the same method on Putin. Unlike under the BIden and Obama administrations who talked tough about Putin, Putin invaded nobody on Trump's watch. But all the Dumbocrats understood was "Trump loves Putin, Na na na na boo-boo!