How to slot custom components in React-Ionic?

Pardon my ignorance, I’m new to React, but how can I use slots in Ionic React since React has no directives? I mean, lets say I’m wanting to add some FontAwesome Icons but since they don’t have the slot attribute, how can I slot them in “start” slot?

Should I create a custom component for slotting? If so, how is that possible in Ionic?