A group of Microsoft Products and technologies used for sharing and managing content, knowledge, and applications.
Hi Mike,
When you add a list to a SharePoint site, you're using a list template. Saving list templates let you reuse customized lists. A template saves fields, formulas, and formatting, and optionally, data as well. Templates can be downloaded for archiving or uploaded to another site collection.
If you are using the site connected to group i.e. Office 365 group site, then these sites do not currently support list templates.
For other SharePoint Online sites and if you are the Global admin, first enable scripting to use list templates. For more info about how to enable scripting, see Turn scripting capabilities on or off.
Once you’ve enabled the custom script, please follow the steps in this article under the section Online,2016,2013 to know how to Create a list template, Download a template and Upload a template to the list template gallery in SharePoint Online.
After following the last step from the article i.e**. Upload a template to the list template gallery in SharePoint Online,**go to the site, **** click Settings>Site Content> New>App.
In the search box, type the name of the list template which you saved and from the search result click on the list template. It’ll ask you to provide a new name. After giving the name, you can use this list.
Please note, if you are using the Office 365 group site, then this feature is currently not available.
Reference:Manage list templates
Let me know if you have any doubt.
Thanks,
Neha