Foxy By the laws to which you ascribe Elizabeth II is part of the government of Australia, to which you give allegiance.
Good on yer!!

Is Mise,

Citizens of Australia in the Citizenship ceremonies
around the country do not pledge allegiance to
Queen Elizabeth. They pledge allegiance Australia and
its people - not the Queen. Unlike Members of parliament
who are required to do so - at least for now.

Is Mise,

Perhaps you're thinking of the Oath of Allegiance on
becoming a British Citizen where in their citizenship
ceremonies they are required to swear an allegiance
to the Queen. Or you're mixing it up with our MPs
when they take their Oath of Office.

In any case Australian citizens pledge their allegiance
to Australia and its people.

Dear Foxy,

«I think that Australia will eventually become a
Republic. It may not happen in my lifetime but
it will happen.»

Indeed, if the trend continues, it looks like some parts of Australia will become a republic.

«Personally I hope that I won't get to see as part of
our country - Kind Charles, Queen Camilla, and Prince
William as Governor-General. That would be ridiculous.»

No, this should not happen in your country.
Most likely even in your own lifetime, you will instead see Dan Andrews become president-for-life of the Republic of Victoria and unlike the Royals who have far better things to do and think about, he will be watching your diet like a hawk, with strict mandatory reporting of each and every calorie you put in your mouth.

You may then try to steal the border through the mine-fields, over to Queensland where you will not have to plead: "Oh Charles, may I please have another biscuit?"

Foxy,
Citizens pledge their allegianceto Australia and its laws, one of the laws is the Constitution which states that the Parliament of Australia consists of the Queen, the Senate and the Representatives, thus allegiance is pledged to the Queen.

You can’t get around that.

Is Mise,

I am not going to argue with you.
You are entitled to believe whatever you want.

The Australian people will make their own decisions
regarding the monarchy - and hopefully it will be done
within my lifetime.

Stay safe and take care.