Which may be part of the whole thing.
Test your enemy’s defenses first.
Yes. And, part was for show - some of the drones apparently had lighting.
Some of the drones were probably instrumented - feeding data about the electronic systems that they encountered, back to Iran/Russia/China.
Iran’s attack on Israel 04/13-04/14/2024, was planned and prepared, ready to go - before the kenetic strike on the building that was next to the Iran Embassy in Damascus.