Personally I don’t know v14 nearly well enough to start having opinions in the way I did for the v10-13 opinionated package starter. So if you do then I’ll look forward to seeing what you come up with!
The only package starting templates for v14, that I know of, are linked to from the Bellissima resources.
https://github.com/umbraco/Umbraco.Packages/blob/main/bellissima/README.md
And the Dotnet template that comes with the Umbraco.Templates but I haven’t had a chance to look at that yet, but assume it's still the bare minimum and "unopinionated"