more than the sum of its parts
US /mɔːr ðæn ðə sʌm əv ɪts pɑːrts/
UK /mɔːr ðæn ðə sʌm əv ɪts pɑːrts/

1.
having a value or quality that is greater than the total of its individual components
:
•
The team's success was more than the sum of its parts; their synergy was incredible.
•
A great piece of art is often considered to be more than the sum of its parts.