As a manager, you can ask a one-off custom question to your team members.
When you add a one-off question, it will appear as an extra question in their next check-in and you will see their answers in their check-in feeds, exactly as for recurring check-in questions.
This custom question can be set up in the Questions section (in the left menu).
If you lack inspiration, here's a list of 25 power questions to ask your team.
If you want to add one or more check-in questions on a recurring basis, please click here: Customize the check-in questions