emojis in Shiny app

Hello!

I am trying to use emojis in the x-axis of a ggplot inside a Shiny app.
I found that is not possible to render them properly when I share it with other persons or in RStudio Cloud.
Is there any possibility to make the emojis visible no matter the computer?


I can provide more details but I think this is not connected with the code itself

Thank you