Direct proof of use
Germany's federal support list records the delivery of 2,700 STRELA man-portable air-defense systems to Ukraine under the air-defense section of its military assistance for the 2014 Russia-Ukraine War.
Contemporaneous German reporting documented the transfer process in March 2022: Der Spiegel reported that Ukraine had already received 500 Strela air-defense missiles from Germany and that further deliveries were being transported toward the war zone, while Die Zeit reported the same Bundestag statement from Foreign Minister Annalena Baerbock and described the missiles as part of roughly 2,700 Strela systems from old Bundeswehr stocks.
Modern War Institute, writing on short-range air defense lessons from Ukraine, stated that videos from the first days of the invasion showed Ukrainian forces using legacy Strela-2 and Igla MANPADS against Russian helicopters. That supports battlefield use of Strela-2 in the conflict but does not by itself identify a specific successful shootdown.
Sources: Germany Military Support for Ukraine, Der Spiegel Strela Deliveries, Die Zeit Further Strela Deliveries, MWI Contested Skies
Narrative
The Strela-2 entered the Ukraine record as a legacy Soviet MANPADS rather than a new Western system. Its conflict role was close-range air defense for Ukrainian forces facing Russian helicopters, low-flying aircraft, and other visible aerial threats near the battlefield.
The German-delivered missiles came from former East German stocks. That origin mattered because the system was familiar across former Warsaw Pact inventories and because German reporting noted age and serviceability concerns around part of the stockpile. Those reports support caution about the condition of some missiles, while Germany's official list still records the STRELA package as delivered military support.
As a Strela-2 / Strela-2M family weapon, the system used passive infrared guidance from a shoulder-fired launcher. Weaponsystems.net describes the improved Strela-2M as having a maximum range of 4.2 km and ceiling of 2.3 km, with all-aspect engagement against helicopters and propeller aircraft. In Ukraine, those characteristics made the system part of the broader layered short-range air-defense environment rather than a stand-alone answer to all Russian air threats.
Sources: MWI Contested Skies, Der Spiegel Strela Deliveries, Germany Military Support for Ukraine, Weaponsystems.net 9K32 Strela-2