Looking at the concept of Ma'al as it appears in the Tanakh, and seeing how the Rabbis extend it to include eating with a blessing. This is another example of the Rabbis creating a meaningful Jewish life post-Temple.
The halachah recognizes six or seven sexual identity categories: male, saris (2 types), androgynus, tumtum, aylonit, and female. This sheet gives the Rambam's succinct definitions of those categories; illustrates that the 'non-binary' categories weren't considered exotic or disastrous with midrashim associating them at Adam, Abraham, and Sarah, as well as a midrash giving what sounds like a 'trans' identity for Isaac. Finally, two halachot illustrate a rabbinic awareness that gender expression follows 'local custom,' i.e. is socially constructed. The rabbinic halachic and midrashic tradition wasn't liberal in the modern sense with regard to these issues, but it does provide in impetus for a Jewishly rooted mind-opening with regard to sex and gender. Thanks to others who have posted source sheets on these issues, particularly Abby Stein, whose translation I quote and whose sheet pointed me to some of the other texts.