As long as you have nsfw content enabled and your instance is federated with it (you’ll have to check since some instances do not federate with porn lemmys due to legal concerns). The list of federated and blocked instances for your instance is listed in the “Instances” link in the footer of your instance.

If you find that you are indeed federated with it, you can subscribe to its comms simply by finding them in the search feature on your own instance. They will then be visible on your homepage when you sort by “subscribed”.