PnP Core GraphFirst approach

Question

I'm considering about using PnP Core instead of PnP Framework because of using MS Graph API. But when I setup my project and tried to get list by id app sends request to /_api/web/lists?$filter=Id+eq+(...)&top=1 instead of using ms graph API request, even if context.GraphFirst = true.

The same situation with getting by title: /_api/web/lists/getbytitle('T, and getting list columns /_api/Web/Lists(guid'_______')/Fields?$top=100.

My code:

var list = await _context.Web.Lists.GetByTitleAsync(listTitle, p => p.Title, p => p.Id, p=>p.Fields);

var list2 = await _context.Web.Lists.GetByIdAsync(list.Id);   

I double-checked the setup of the GraphFirst property. But still don't understand why PnP Core still uses these REST API endpoints instead of MS Graph API. Please explain my this behaviour.