Use Entity Framework Core 3.0 in .Net 4.7.2 Web Forms application

I was hoping to be able to create a EF core 3.0 DAL project and use this for my database operation in a .Net 4.7.2 Web forms application. But it looks like the latest EF core 3.0 targets .Net Standard 2.1 and .Net 4.7.2 is not compatible with that? Is there any way to make use of EF Core 3.0 and DI with a Web forms app or do I just need to use EF6?