more babble
the royal family have broken that "no politics" convention before and have remained in power.
so again your conditional stipulation that "she must resign first" is of your own making and is your own delusion.
here are examples of the Queen, prince William and the new King Charles breaking that "no politics" protocol
"It is vital to the health both of the United Kingdom and of Wales that our democratic institutions flourish and adapt," the monarch said during a visit to the Welsh Assembly, according to The Times.
"I share your concerns that we must encourage all our people to exercise their right to vote. This is a real challenge now before us all."
Queen 2003 discussing voting
"Prince William Broke With Royal Tradition to Ask Sheep Farmers About Brexit"
Farmers told the royals that no deal would be a "perfect storm"
time.com
prince charles sent a series of letters to influence politicians over years.
these were later leaked to the press
"The "black spider" memos are letters and memorandums written by Charles, Prince of Wales, to British government ministers and politicians over the years. As the modern British monarch remains politically neutral by tradition, the letters are controversial because of the Prince of Wales's position at the time, the eldest child of the British monarch Queen Elizabeth II and heir apparent to the British throne."
en.wikipedia.org
TL;DR. you are spouting more babble. rid yourself of your misconceptions and you will do better.
your stipulation that "the queen must resign in order to comment" is delusional BS.
and additionally meghan was a family matter. not pure politics.
the above examples of the queen, william and the now king breaking convention are 100% political in nature