You can see the whole article on the archive site. They quote a Lib Dem councillor about the museum's decision.
Keith Hoskins, a Liberal Democrat councillor and executive member for arts at North Herts Council, which is run by a Lib Dem and Labour coalition, said: “Elagabalus most definitely preferred the ‘she’ pronoun and as such this is something we reflect when discussing her in contemporary times.”
He added: “North Herts Museum has one coin of Elagabalus, which we periodically put on display as it is one of a few LGBTQ+ items we have in our collection.
“We try to be sensitive to identifying pronouns for people in the past, as we are for people in the present, it is only polite and respectful.
“We know that Elagabalus identified as a woman and was explicit about which pronouns to use, which shows that pronouns are not a new thing.”