Hi Mcorning,
When was your environment created? If the name of the Environment that you are currently working on is in the following format:
“{Your name}’s environment”. Then it will not provide any of the new GA functionality (like picklists or translation sets), however, apps, flows and entities will remain functional as before. And entities in old environments won't show up the Field Properties Pane (like Unique, Required or searchable) under the Entity editing page.
There are some changes mentioned in the blog below:
Introducing the new entities in the Common data model
Please also take a look at the following blog:
Migration from Public Preview
Here I would suggest to create a new Environment from scratch, then follow the Video.
New Environment could be created under Admin Center, top-right of the Environment pane.
If you need any further assistance on this, please feel free to post back.
Regards