Those drones weren't developed because of the war. But the existence of those drones (among other newish technologies) might plausibly have something to do with Ukraine believing they can successfully resist.
If you follow the war closely, the development of the drones during the war is absolutely breathtaking.
Originally, Ukraine had a few Bayraktars (nowadays hopelessly obsolete) and some observation drones. They couldn't even use drones against armor. The original losses of Russian armor in 2022 were mostly due to Javelins, NLAWs and similar specialized weapons.
Nowadays, the Ukrainians deploy jet-powered Palyanitsya drones to the deep rear of the enemy and regularly destroy heavy equipment with explosive drones.