Netanyahu frequently visits various European states. Putin went to Mongolia and back. All of these are signatories.
Also, if look at the exact plane movements of his visits, they specifically avoid the air space of countries that do take the ICC seriously.
[0] https://en.wikipedia.org/wiki/List_of_international_prime_mi...
[1] https://abcnews.go.com/Politics/netanyahus-jet-largely-avoid...