Writing-mode property doesn't apply on emojis.
https://www.w3schools.com/code/tryit.asp?filename=GUJS4BUWSWZC
https://www.w3schools.com/code/tryit.asp?filename=GUJS4BUWSWZC
Maybe because they're originally Japanese characters, and apparently Japanese vertical writing isn't rotated.
Vertical text with CSS 3 Writing Modes
Languages with latin-based writing systems such as English are typically written left to right, and from top to bottom. However, there is a whole different world of writing modes out there. CSS3...generatedcontent.org
`text-orientation: sideways` seems to fix it.