Then there exist "Styles" in Impress/Draw and newly in the Styles pane in Writer side bar. They use the ODF element <table:table-template> inside the document. The implementation has still bugs. And the ODF specification allows more customization of such table templates as currently is implemented. On the other hand some properties cannot be part of such template, but are always properties of the single table. For to examine, what is possible to be stored in a table-template and what always will be a hard formatting of a single table, you need to look into the ODF specification. https://www.oasis-open.org/standards#opendocumentv1.2