All you have to do is select the ➡️ emoji from your emoji picker, then type the link next to it. (You have to include https:// at the start to make the link clickable by the way.)
I add ➡️ just to make it easier to see where the important links are in a post. They don't serve any other function.
@FediTips
yeh, I was hoping there was a way to nerf preview. In some posts it gets in the way