Sure, here's how you can add a podcast on Apple:

1. Open the Apple Podcasts app on your iPhone, iPad, or iPod touch.
2. Tap on the "Search" button at the bottom right corner of the screen.
3. Type the name of the podcast you're looking for in the search bar and then tap "Search".
4. Once you've found the podcast you want, tap on it to open its info page.
5. Tap the "+Subscribe" button to subscribe to the podcast. The button will turn into a checkmark and say "Subscribed" once the podcast has been added.

If you want to add a podcast by URL:

1. Open the Apple Podcasts app.
2. Tap on the "Library" tab at the bottom of the screen.
3. Tap on the "Edit" button at the top right of the screen.
4. Tap "Add a Show by URL...".
5. Enter the URL of the podcast's RSS feed.
6. Tap "Subscribe".

That's it! The podcast will now appear in your library.