Rokko-sama
This is Kawaguchi Hidetoshi. This is my humble answer to the question.
It certainly means that one person can appear in the land of one France, but there are many other worlds other than the Shaba world (within which the power of one person Nyorai falls), which is the land of one France, and in each world, there are worlds where Buddha lives, and there are also worlds where they are absent, such as the Shaba world today.
The most famous French land is the Pure Land of Paradise, but there are also other things such as the Myōki Pure Land, and the Joruri Pure Land.
Nyorai is a person who attained enlightenment and became a Buddha, but they each awoke the Bodhisattva mind a long time ago, made vows as Bodhisattvas, and attained enlightenment after going through a long, long ascetic practice.
Although each Buddha has the same bodhi heart, the details of the vow are different, and the “function” of each Buddha is also different depending on the content of the vow and changes in practice.
The Buddha's body has a “Dharma body,” which is the body of truth, and a “body of color,” which is the body of salvation, and although there is no difference between the “Dharma body,” which is the body of truth, the contents of his vows and ascetic practices are reflected in the “color body,” which is the body of salvation.
Therefore, there are various Buddha statues with different “functions,” such as Buddha Buddha, Amida Nyorai, Dainichi Nyorai, Yakushi Nyorai, etc.
Also, in the Shaba world today, there is no Nyorai, but it is a place where it is written by the Buddha that Miroku Bosatsu will attain enlightenment and be descended after about 6 billion years.
Until then, I would like to continue devoting myself towards enlightenment, relying on Buddhism left by the Buddha.
Incidentally, as an aside, it seems that Miroku Bosatsu actually awakened the Bodhisattva mind before the Buddha, but since the Buddha's bodhisattva was much stronger than that of Miroku Bosatsu, the speed of the ascetic practice was also quite fast (even so, the Three Asoh Gi also took it...), and it seems that Buddha was able to attain enlightenment before Miroku Bosatsu.
In this way, what kind of Buddha you become is determined by the strength and weakness of each Bodhi Heart (the content of the Bodhi Heart itself is the same), the content of your vows as a Bodhisattva, the process of ascetic practice, etc.
Kawaguchi Hidetoshi Gassho