Normally you go to Settings > Reading and enable Portfolio. Indeed, the setting is still available on the production side.
However, in my test environment, the setting is not available. I noticed it disappeared shortly after making a few changes to my site. I disabled XML sitemaps in Yoast SEO, and installed and activated Restricted Site Access.
I’ve tried to walk my changes back… I enabled sitemaps, de-activated the new plugin. No luck. I read that it sometimes helps to clear your cache. I installed WP Super Cache and did that. No luck.
Any ideas on what I did to cause this setting to disappear? Any ideas on how to get it to show up again?