Install successful, but no button in editor or...

This must be an obscure one since I don't see others mentioning it. Probably my fault somehow. I installed on Joomla 4.4, and got a successful install message. If I stick {source} modules manually into an article they work as expected. But, the </> option isn't appearing in the editor, and Sourcerer doesn't seem to show up anywhere for me to select the configuration options the documentation mentions. Bug? Mistake on my part?

Oooooh, I was looking for it in alphabetical order as Sourceror rather than first word being System. My fault, and thank you.