If the extraterrestrial beings have been associated with Earth for a long time, they may have had multiple reincarnations on Earth. However, in some cases, it may be their first reincarnation on Earth.
Each person understands and speaks based on their own experiences.
Therefore, the topic of whether reincarnation occurs only once or multiple times becomes a subject of discussion.
For some people, reincarnation occurring only once (the first time) is the truth. For others, it is true that they have reincarnated many times.
Also, sometimes the difference is only in the words and expressions. Generally, when people talk about reincarnation, it means being reborn as a human with a physical body, so the repetition of physical aging is reincarnation. And the soul is constant. This is what is generally said about reincarnation.
However, some people use the word "reincarnation" in a different context. In that context, they use "reincarnation" when they mean that the soul does not die, so there is no reincarnation.
This is a matter of definition of what "reincarnation" means, and the expression differs depending on which definition is followed. If "reincarnation" refers to the physical body, then reincarnation exists. If it refers to the soul, then reincarnation does not exist.
Despite this, there are cults, religious organizations, or specific spiritual groups that do not seem to understand these concepts well and mix them up.
Some cults or religious organizations claim that reincarnation occurs only once, even though it is about the physical body, not the soul. In reality, there are groups of extraterrestrial souls who have come to Earth from space and who, in many cases, reincarnate only once. For those people, that is the truth, but that is not always the case.
Especially for those who have reincarnated many times on Earth, they have repeated the cycle of reincarnation on Earth many times, so physical reincarnation exists.
However, there are always a certain number of people who, for some reason, study this in some cult and proudly claim, "There is no reincarnation," making an uninformed argument. For example, in Christianity and other desert religions, there is an implicit worldview that life is only once, born in a harsh environment. On the other hand, in Asia, where people witness plants and trees being reborn repeatedly, the value of life and death being reincarnation is rooted in the foundation of religion. Even if it is a cult that claims to have been channeled from space or taught by aliens, it is often just that the concept of the soul's continuity from the aliens' perspective is being mentioned, and it often does not reflect the reality of Earth.
There are cases where aliens come to Earth and, in their first reincarnation, know about the continuity of the soul. In such cases, they may argue against the universality of the soul by saying that reincarnation does not exist. That is fine in itself. However, in many cases, reincarnation is clearly present for the people of Earth, so arguing that it is true for all cases based on a few cases is unreasonable.