Well, if you want one theory that could support the “Bae is Henry’s father” theory:
Maybe when Bae was transported to a “land without magic, he didn’t go to our world, but to a different world/dimension. There, he met Jefferson, and, for whatever reason, came to our world. If what we consider FTL is really just the EF (Enchanted Forest), and FTL includes many of he different worlds in Jeff’s hat (which may explain how Jefferson was taken from Wonderland into SB), then whichever world Bae was transported to was also frozen in time. Maybe this prevents him from aging, maybe not. Maybe it depends on the world. But if he DIDN’T age, then being transported from the land without magic to SB would make him continue to age and then he MIGHT be the age of a man who could be Henry’s father.
OR, Bae is long dead, and I just wrote a long explanation for a crazy, impossible theory 😆