Well, the inability to conduct widescale SEAD/DEAD is the major failure of the Russian Air Force in this war.
According to RUSI, they had some sporadic success, but that was about it:
“Throughout March, Su-35S and Su-30SM fighters continued to conduct CAPs between 30,000 and 50,000 ft, but generally without entering Ukrainian-controlled airspace. Instead, they acted as a deterrent to Ukrainian attack sorties, but were also tasked to conduct SEAD operations. To this end, their CAPs were used as bait to try to make Ukrainian SAM systems turn on their radars to fire at them. If SA-11s or other SAMs did try to engage them, the Flankers would fire Kh-31P and, later, older Kh-58 ARMs at long ranges to home in on the radar emissions, and then turn away.”