If they were still states in the Union then West Virginia should still be a part of Virginia.
“If they were still states in the Union then West Virginia should still be a part of Virginia.”
That is incorrect, because the pro-Union Virginia representatives seated in the U.S. Congress during the war undertook the Constitutional steps necessary to obtain the consent of Congress for the secession of West Virginia. The postwar State of Virginia sought to revoke its agreement and resorted to a lawsuit that went to the Supereme Court f the United States, but lost the case and confirmed the consent of Congress for West Virginia to secede with certain counties from Virginia.
Virginia v. West Virginia, 78 U.S. 39 (1871),
https://en.wikipedia.org/wiki/Virginia_v._West_Virginia