How to make all date parts two digits with Notepad++

Let say you have the following list of dates:

01/06/2022
15/06/2022
30/12/2021
25/10/1985
01/01/2001

and you want transform them in order that every date part has at least two digits:

01/06/2022
15/06/2022
30/12/2021
25/10/1985
01/01/2001

To do this in Notepad++, you can just hit CTRL + H for Replace window and the select the following:

• Find what: \b(\d)(?=/)
• Replace with: 0$1
• Flag Regular expression
• Do not flag . matches new lines