Speaking as someone w a degree in ancient history I have a lot of Opinions about that 1 post about Elagabalus that’s going around but I don’t have the energy to get into it properly. I will however share this very pertinent section from the BBC article on the subject:
Dr Shushma Malik, a Cambridge university classics professor, told the BBC: “The historians we use to try and understand the life of Elagabalus are extremely hostile towards him, and therefore cannot be taken at face value. We don’t have any direct evidence from Elagabalus himself of his own words.
"There are many examples in Roman literature of times where effeminate language and words were used as a way of criticising or weakening a political figure.
"References to Elagabalus wearing makeup, wigs and removing body hair may have been written in order to undermine the unpopular emperor.”
Dr Malik added that whilst Romans were aware of gender fluidity, and there are examples of pronouns being changed in literature, it “was usually used in reference to myth and religion, rather than to describe living people”.
Museum reclassifies Roman emperor as trans woman
I’d also like to note that the Ancient sources about Elagabalus were, frequently, very racist (Elagabalus was from modern day Syria) and as a result I’m personally a bit suspect of any coverage that doesn’t mention the racial aspect.