Israel ... of the twelve tribes.
I don't know of any other woman but Mary who gave birth to Christ, ...
As you said ... Revelation is highly metaphorical.
Perhaps we can agree on that. ;^)
As is much of the Scripture. It does not mean it should be ignored, or the central figure, described as a queen and Mother of Christ, be explained away as some accidental metaphor meaning Israel, or that the battle Satan wages on he and her spiritual children not happening. It does mean that details such as the color of the dragon, birth pangs, the vomit form the dragon's mouth etc. need not be taken literally.