Is SDEX on Coinbase?

Excuse me, I'm a bit confused about something. I've been hearing a lot about SDEX recently, and I'm wondering if it's available on Coinbase, one of the most popular cryptocurrency exchanges. I'm interested in exploring SDEX and its offerings, but I want to make sure I'm using a reputable and reliable platform. Could you please clarify if SDEX is indeed listed on Coinbase, or if I should be looking at other options? Thank you for your help.