For a default date picker, you can set it to date and time in the properties, but indeed not select it (only typing).
There are some widgets in the marketplace (Mendix Marketplace - Home and search on datetime) where this is possible.
I always use Mendix Marketplace - React DateTimePicker, but I might be a bit biased.
Hope this helps!
You can use this widgets here: https://marketplace.mendix.com/link/component/116978
Unfortunaly the default date picker doesn’t let you pick the time…
Hope this Helps!!!