And he arose that night and took his two wives, his two female servants, and his eleven sons, and crossed over the ford of Jabbok.
Genesis 32:22 (NKJV)
Normally, when the Hebrew language says "men" or "sons," the collective noun can also mean "men and women" and "sons and daughters." But when the collective noun has a numeric descriptor (ELEVEN sons), it is specifically addressing the sons and not the daughters.
Here, the rabbis note that this text has specifically EXCLUDED Dinah.
Where is she?
It's unclear, but one view is that Jacob has hidden her in a basket so that Esau does not see her. If we are meant to view Esau as a symbol of wickedness and lustful cravings, it would make sense that Jacob would hide his daughter from his brother.
It's an interesting perspective. A subsequent view takes it further and suggests that this may be a nod to the horror of Genesis 34. Jacob wanted to shield her, but the thing he feared happens anyway.