Can I have our own affiliate link to use in our social media promotion of our own product?

Like the title says, I would like to have an affiliate link so that when we create social campaigns for our product, we can earn the commission from the link.

Alternatively, sometimes we pay influencers to create media and they ask to use our affiliate link, since we are already paying them.... but we don't have one to offer.

Is this allowed? If so, how/where do I create it?