Given all the current Turkish sabre rattling in the region including calls for an independent Turkish Cypriot state, exercises between Israeli F-35 stealth fighters and Cypriot air defence units are quite a big statement:
link
To be honest the Cypriot air defence system probably wouldn't locate or be able to target an F-35 unless the F-35 was festooned in radar reflectors.
Cypriots were meant to get S300s in 1990s but these were transferred to Greece after massive Turkish uproar – the Greeks still use them in a unit located on Crete.
Currently Cypriot air defence includes ancient Italian Aspide SAMs based on AIM-7 Sparrow as well as Russian Buk and Tors, both supposedly advanced but both easy prey for Turkish drones over Syria and Nagorno-Karabakh.
The remainder of the air defence force are ageing Swiss radar guided Oerlikon 35mm and even older Serbian manually targeted Zastava M55A3 20mm guns.
I suspect in a real war the Cypriot air defence system would be quickly neutralised by the Turks.
But its clear Israel supports Cyprus.