AshlinAjithaVijayan-9317
As of now Microsoft Forms is hard coded to use US date format and cannot be changed. Here is an active feedback link regarding this feature at User Voice portal. Kindly vote for this feature so that product team prioritize this feature in the roadmap.
For M365 sites, you can change date format using below link:
https://myaccount.microsoft.com/settingsAndPrivacy
Please do "Accept the answer" wherever the information provided helps you. This will help others in the community as well.