the tip of the iceberg
US /ðə tɪp əv ði ˈaɪs.bɜːɡ/
UK /ðə tɪp əv ði ˈaɪs.bɜːɡ/

1.
la punta del iceberg
only a small, visible part of a much larger, hidden problem or situation
:
•
The recent scandal is just the tip of the iceberg; there's much more corruption to uncover.
El reciente escándalo es solo la punta del iceberg; hay mucha más corrupción por descubrir.
•
His current financial troubles are just the tip of the iceberg of his deeper debt problems.
Sus problemas financieros actuales son solo la punta del iceberg de sus problemas de deuda más profundos.