Using Emoji in Affinity Designer
A simple work around on using Emoji in Affinity Designer
Affinity Designer and Affinity Photo don't support Emojis. Which means that if you try to add an Emoji or Symbol from the Edit menu all you see is a square. I don't know why Affinity hasn't supported this - maybe in version 2?
Alternative Solution
You can get around this limitations by using the Emoji images on the emojipedia.org website. Simply search for the emoji or symbol that your looking for and then drag and drop it into your document.
While this isn't the best solution, it does offer an advantage - the ability to select the emoji that works for your design.
Create an Emoji Assets Collection
I took about 10-minutes to build my own Emoji Asset Collection. I basically went through all the popular Emoji that I thought I would use.
Basically, I dragged and drop the images from emojipedia and then move the image to a dedicated Asset panel.