The deployment of Russian warplanes in Libya has been confirmed by multiple sources. According to Bloomberg news agency, their presence was first reported by Fathi Bashagha, the security chief in Tripoli, who said at least six MiG 29s and two Sukhoi 24s had flown into the east from the Russian-controlled Hmeimim Air Base in Syria, escorted by two Su-35 Russian air force jets. This was later confirmed by satellite images (see here and here), by images of the aircraft taken by the US Air Force, and indirectly by Saqr al-Jaroushi, the head of the air force of Russia’s backed Libyan National Army (LNA), who on May 20 boasted that his forces were about to launch “the largest aerial campaign in Libyan history”.
Further information on the deployment of the aircraft emerged afterwards. This is happening after the Russia-backed LNA was forced to retreat from the airbase of al-Watiyah and Wagner fighters were allegedly expelled from a location in southern Tripoli in the previous days, which points to a Russian escalation in support of LNA through an increase of air power to compensate those losses.
As POLYGRAPH.info notes, the presence of Russian fighter jets in Libya has been confirmed by multiple "[i]ndependent sources, including those critical of the the US." Most of these reports predate the AFRICOM press release (26 May).
See POLYGRAPH.info's full debunk here, and our own reporting on the Kremlin-linked Wagner Group here and here.