I understand what your question was, I didn't ask what you wanted to fill down, I asked what do you want to fill it down with.
The instructions I gave is how you would build out filling it down.
In column one is a date I believe, but I do not know how you will determine what value will go there, I can only tell you what you need to do to fill it, not tell you what value goes there
What specific thing did I not answer for you that I can answer for you?
I feel the issue is, you are asking the Power Automate forum to build you a script, which should go to the Office Forums, I was giving you how you can just do it with Power Automate, without necessarily using a Script.
But if you want to use a Script, then you have to have the Office People help you build one, then you can execute that script from Power Automate, but you will still have to provide them with what/how you want the data populated.
For example, are you going to put the same date on them all, and if not, how are you going to figure out the value to put there in the script etc.
Just want to make sure that using a Script is the best option (could be) and it is something that you need to have scheduled with a flow or is this a one time deal or??