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Are you wantng to change a file's modified date which works from inside File Explorer context menu. Are you aware of external tools like "Bulk File Changer" or "Petges" ?
If all you want to do is change the attribute, go with Petgres (link below), it changes many attributes not normally accessible.
Is that what you were looking for? If not......can you explain in more detail what you are trying to do.
I will opt out, so a different expert can take a whack at this. Not sure if such a thing exists, but I've been wrong before.