Is Create cloud CS 6 still available?

I started my Creative Cloud subscription with CS6, so I can install my CS6 software and have them listed with my other software in the CC app. https://prodesigntools.com/adobe-cs6-direct-download-links.html

If you didn't start your subscription with CS6, I'm not sure it will work for you, but it's worth a shot. 

Note: this is on Windows--your mileage on the Mac OS may vary.

Creative Cloud desktop app doesn't offer CS6 anymore.  Unless you previously purchased CS6 when it was still being sold (pre-2017), it's out of reach now.  It's not legally sold by any retailer, vendor in any country.

You can no longer legally purchase a CS6 serial number.

Adobe stopped including CS6 with a subscription about 2 years ago

If you already own CS6 by purchasing it, with a serial number, you may install on a compatible operating system

CS 6 was the last version of the Adobe Creative Suite.
thea oldest versions in Creative Cloud are:

Note that: Ps 23.1.1 is the latest version