As has been said, if the service and food is exceptional I would probably tip more, as I like to be generous with my appreciations, but, you have no obligation.
If only one helper is extraordinary in their service you could always slip them a little something else under the table. Pun intended. lol
I see all tipping as a 2 part deal. One part is the actual service, the second and perhaps most important, to me, is a GREAT attitude!
I’d tip a server even more if they have a personality that I find exceptional, even if the food is not that great.