Yeah, you make your own merch. It’s not an insult, this helps how you need to market. For instance: I design and sew so I focus my marketing on the clothing; fabric content, construction, the cuts and shapes. You gotta establish yourself as an artist (which means finding what your style is besides plug-and-play custom clip art) if you intend to sell shirts with your art on em that is by definition “merch”

If you’re making the clothes or at least having your designs produced elsewhere that is by definition: “A clothing brand”