The Monarch is the physical embodiment of the people's sovereignty as made clear in the coronation ceremony which is an election, the people have a right to reject the heir apparent and choose a sibling just as the heir to the Throne has the right to reject the office, again as demonstrated at the time of the coronation. The Monarch is the people and the people are the Monarch, it is a marriage, the Monarch is wedded to the people as demonstrated by the wearing of a ring presented on behalf of the people at the coronation ceremony.
The Monarch is the official Governor of the nation according to the coronation oath. The Monarch is obliged to delegate the authority of governance to a political party of the people's choice but not the power of governance which remains with the Monarch as representing the power of the people. As a delegated authority all decisions put forward by HM government have ultimately to be approved by the Monarch who retains the power of veto on the people's behalf.
When in 1972 Queen Elizabeth II agreed to surrender the supremacy of the Crown to a foreign power it was an act of abdication for the Crown is supreme or it is but nothing at all.
It follows that as Parliament draws its legitimacy from the Crown since 1972 Parliament has been an unlawful assembly and has acted in a like manner. All of this was confirmed with the signing of the Maastrich Treaty in 1992 when the Queen officially became a citizen of the EU as announced by the then Prime Minister John Major in the House of Commons. No one can be both Monarch and citizen at the same time." (Emphasis is mine. CR)
Q2. Is she aware that she is no longer the Monarch?
A4. Most of the nation are unaware, I should think.