The example is correct - there is no .NET Core packages (because it's just too many packages). You could use MiniProfiler.Shared and do some manual bits, but thus far profiling console applications is rare enough that another package of packages and dependencies between .Shared and .AspNetCore isn't really warranted.
For what it's worth, MiniProfiler simple pre-dates .NET Core by many years. If it didn't exist back then, it'd have been called MiniProfiler.AspNet today. It retains the MiniProfiler name for ease of user upgrades. It is an ASP.NET with those bits just like MiniProfiler.AspNetCore is, though.