"Leading" how, and "helping out" how....exactly.
I mean all depends on your store, mine does a lot of things that aren’t specifically picking and packing but still benefit the store or fufillment.
Leading: observing, giving feedback, helping find INFs, monitoring epick to rearrange people as needed or even pull out people to help in other areas of the store.
Things they do to help out include: working rfid reject report to get ahead of INFs, help in keeping the backroom brand by doing projects and cleaning up out back, manually auditing areas from last weeks top inf areas.
There are a million things a fufillment TL can do that benefit fufillment that’s not picking or packing. If they’re picking or packing chances are they have little time to step away and be a leader. You’ll never be able to step back and help your team improve or follow up with them if you’re in a batch. That would be like of the service and engagement TL was on register for their entire shift.