What are these
objects? Are they all the same kind of object? If so, I'd recommend that you place them all in some "container" node in your scene, which will make them easy to find and update via a script. For example, if all of the objects are
Label nodes, you could create your scene like this:
CanvasLayer (or whatever the root node is)
Then, in a script attached to the root node, something like this:
for child in $LabelContainer.get_children(): # get each child control
if child is Label: # if this child is a Label...
child.text = "your text here" # update it's text to whatever...