Here are some of the designs I've done for T-shirts and other products. You can find links to my storefronts below.
I also take T-shirt design requests. The fee varies based on potential marketability of the design. (pop culture meme vs niche topic vs sole copyright transfer, etc)
If you are interested in commissioning a custom design, contact me via email or one of the other platforms like Discord linked at the top of the page.