getting date and time from different date notations within strings

@ Dante Armor, thanks for your advice, i can run the code now.
The dates in the formats dd-mm-yyyy hh:mm:nn,000 (like e.g. 1-10-2020 08:14:54:160) are not converted to the yyyy-mm-dd hh:nn:ss,000 notations.
Is there a way to get the date time notations right?