How do I paste text into a text input sprite at the point of the cursor.?

How do I paste text into a text input object at the point of the cursor.?

I want to paste "Hello World" into a text input sprite at this example location:

Text input has "This is a test"... I want to paste in "Hello World" here...

"This is a >paste here | This is the current cursor position< test" - the result would be:

"This is a Hello World test"

This is a dynamic modification so I cant simply amend as a simple replacement.

In other words - the paste-in text could be many different text blocks.

Thank You - d

No luck, but this is my latest attempt (as stated, I have the text on the clipboard):

function pasteAtCursor() {
 // Get a reference to the text input object
 const input = runtime.objects.myTextInput.GetInputControl();

 // Get the current cursor position
 const startPos = input.selectionStart;
 const endPos = input.selectionEnd;

 // Read the text from the clipboard
 navigator.clipboard.readText().then((clipboardText) => {
 // Insert the clipboard text at the current cursor position
 const currentValue = input.value;
 const newValue = currentValue.substring(0, startPos) + clipboardText + currentValue.substring(endPos);
 input.value = newValue;

 // Update the cursor position to be immediately after the pasted text
 input.setSelectionRange(startPos + clipboardText.length, startPos + clipboardText.length);
 });
}

The Why: I am having the user click buttons - the action then pastes a text string into the place where the cursor is placed (within the text-input object. Currently the "amend action" always places it at the end.

The app calls for the user to choose where to paste the string - they do not know what the string is and it is dynamic so therefore it can't be hardcoded. Make sense?

If there is an easier way, I'm all ears :-)