Question about setting track number based on MP3 creation date

You can add a new column to the File List via Preferences → File List that displays the creation date using %_file_create_datetime% as value and %_file_create_datetime_raw% as sort criteria.

Clicking on the header of this new column in the File List sorts the files accordingly (alternatively: View → Sort by → Created).

After that, you can use Convert → Assign Track Numbers... to sequentially assign track numbers in one go.