$ echo 'from typing import NamedTuple; NamedTuple("A")' | ./python -m ast
Module(
   body=[
      ImportFrom(
         module='typing',
         names=[
            alias(name='NamedTuple')],
         level=0),
      Expr(
         value=Call(
            func=Name(id='NamedTuple', ctx=Load()),
            args=[
               Constant(value='A')],
            keywords=[]))],
   type_ignores=[])

So mod.body[-1].value is a call:

    Call(func=Name(id='NamedTuple', ctx=Load()), args=[Constant(value='A')], keywords=[])

I do not know what Astroid does with this node, but seem the problem is in its infer() method.