Hello! Reading about the situation with dates, I'm also an RPA developer and use PAD. When I've wanted to work with Excel, the date format changes when using the Write to Excel Worksheet instruction.
Despite trying all the previously mentioned solutions, nothing worked.
Finally, I decided to use the instructions that allow creating a data table. This way, it's possible to retrieve and write Excel data without losing the date format.
I've attached an example image of what was done. (It might be a bit more complex, but it works to maintain the desired date format.)

I hope it is helpful