One link is dead and several others have connection issues (see Checklinks).
Per WP:CAP, captions only end with a period if the text is a complete sentence (e.g., fix Cuauhtémoc, Mohawk Kings, etc.) Done
Some publishers are wiki/external-linked in the citations while others are not—need to be consistent
All words in some citation titles are capitalized while others are not—need to be consistent
Do you really need six citations to support "Suggestions of change have been raised in the Commonwealth realms in regards to the order of succession..."?
Inline citation should follow punctuation mark in "The monarch is represented in the territory by the Rigsombudsmand..."
You might consider outsourcing the table in section Current monarchies to List_of_monarchs_in_the_Americas#Current_monarchies—it's a bit overwhelming in this article Done
Done