I help to run a DofE programme which offers Bronze, Silver and Gold. We ask applicants to fill in a form but rarely turn anyone away. It’s only happened when we are massively oversubsribed of if we feel someone doesn’t want to do it but is being pushed into it by a parent etc. We mainly use it to get them to think about what they are signing up for.
Of course, your daughter’s group may be different, but the advice offered above is all good. She should write about what attributes she can bring to a group (teamwork, organisation etc) and what she hopes to learn and get out of it (confidence, meeting new people, challenging herself, helping others). She should be honest but don’t forget that it is not just about the expeditions, there is a requirement for regular physical activity, volunteering and developing a skill.