FormBuilder - Unable to set default values for Date Picker fields
It's not possible to set a default value for a Date Picker field. After selecting date on picker prompt the page redirects to /civicrm/admin/afform#/?tab=form
Seen in 5.53 production site and tested on dmaster 5.54.alpha1.
Also note that if 'Search by range' is marked, then two default values must be available