Sexuality and gender are expressed in many, many languages across the world, across countries and across cultures and across time. Language is fluid and changes as does all form of expression.
Language is indeed fluid but it is also a democracy. Or, at least, it used to be, before pronoun demanders and their enablers. It used to be, before Australia decided it can use the force of the State to make me utter things I do not believe.
I do not understand why you are so fixated on how the current version of English expresses gender and sex. Some languages assign gender to inanimate objects; some assign no gender at all.
English does not 'express' gender at all. The idea that the sexed pronouns - he, she - and the unsexed they - refer to the 'gender' or 'gender identity' of the target is nonsense. You have been warned, Toni. When you decide the target of a pronoun gets to determine their pronoun, you have no escape clause when neopronouns are demaded. Have a gander on Tik Tok for the variety of neopronouns you will be expected to learn.
Oh, and when you see 'she/they', you better mix it up, you better not just use 'she', because the target of the pronouns will be evaluating your she/they ratio, and it
better be right.