File dates are wrong on certain apps after file migration from Time Machine on Big Sur

I have this too, I see what you're saying but "date added" is useless metric if it picks up "when restored". I want to know, last modified and date created? Has half of that information been destroyed? How do I get it back? What useful information could "date added" possibly convey to me if all 200,000 files on MacBook will have the same date which has nothing to do with when they were created or when they were last modified? This is really awful, like the new notifications.

That aside, in Firefox I don't see how to substitute "date modified" for "date added" in the dialog. Can I? In this or other apps? "Date added" in the context of a restored backup is a totally useless metric, I want to know date modified. It seems like for an upload file dialog, date modified is the right thing - I don't want to know when the file was created, I want to know the most recent revision when I do something like send an email for example. This thing will not fix itself as I update files if I can't change it to date modified. This is horrible for UX. Do I have to go back to windows? What a nightmare.

Carl-click on the headers and choose the columns you want to see. Or, use the View Options.

Your two screenshots show different dates. One is Modified (file system data), and the other is Added (metadata). Make sure you are comparing the same date type.

That's the answer!