Regarding every generation in Genesis, there is always, and only, one father we can find the paternal years for. We can’t do that for Ishmael and Esau.
Why might that be the case when they also had sons?
[Note: Here Ishmael’s only shown ages are that of 13 when he was circumcised (Gen 17:25) and that of his death at about 137 (Gen 25:17). As for Esau, only his age of 40 at marriage is shown (Gen 26:34)].