A regex to validate phone numbers in Togo

I was refactoring an old website and came accros the need to validate a phone number from Togo.


I couldn't find any regex online. I found this website helpful in getting the general structure of a phone number in Togo. You can play with it on Regxr => https://regexr.com/7hfnr

If you find a way to optimize it a little bit, do not hesitate to share.