By default, Reclaim will not block time for all-day events from your source calendar. However, you can configure your sync policy to Sync all all-day events or to Sync only all-day events marked as busy.
Events marked as Free
If a source event is marked as Free, it will be synced to your destination calendar but marked as Free.
If you use the "Personal Commitment" or "Busy" privacy level for synced events, events marked as free time will not be synced. They will only sync if you've used the "full details" options for sync privacy.
Events from Gmail
Reclaim will automatically block time for source events created by Gmail (e.g., reservations, appointments, etc.) and mark the time as Busy on your destination calendar.
Events that your target calendar's is invited to
If your destination calendar's email is already invited to a source event, Reclaim will skip blocking it out to avoid duplication.
Refer to How RSVP affects synced events.