Merriam-Webster Dictionary's word of the year for 2019 is "they".

Merriam-Webster's Words of the Year 2019

"More recently, though, they has also been used to refer to one person whose gender identity is nonbinary, a sense that is increasingly common in published, edited text, as well as social media and in daily personal interactions between English speakers.

There's no doubt that its use is established in the English language, which is why it was added to the Merriam-Webster[.]com dictionary this past September. "

heck yes

yaaaaaaaaas

there was one copyediting assignment where we had to avoid singular they and it taught me I love singular they

if only MLA and APA guides would change