MAUI - Share a library with ASP.NET Core

What type of class library, of .NET Core 8, can be shared between a MAUI Blazor App .NET 8 and an ASP.NET Core Web Api app .NET 8?  It would be nice if you guys would document this somewhere.  If it is, can you please point me to the appropriate documentation, specific URL and mention the section of the doc the info is in.  I have been researching for 2 days and no luck.