It would be good if you could set custom date formats for the category scale for each of the different date group by options. If you set it to dd/MM/YYYY it will use this for every scenario which isn't very user friendly as when you group by year you don't want it to show 01/01/2022.
Ideally you would want the below options and in my scenario using a fiscal calendar would have something like
Day dd/MM/YYYY
Week dd/MM/YYYY
Month MMM YYYY
Quarter MMM YYYY
Year YYYY
