The Russians have no supremacy yet?

As reported, Russian ground and tactical air operations remained focused on the central part of Donbas over the weekend.
The British Ministry adds in the report that the Russian Air Force has not had any results in the conflicts so far.
"Russia cannot gain complete supremacy in the air, rarely penetrating deep beyond Ukrainian lines. For years, most Russian combat training has probably been largely designed to impress high-ranking officials rather than develop dynamic initiative among air crews," the report said.

Latest Defence Intelligence update on the situation in Ukraine - 20 June 2022

Find out more about the UK government's response: https://t.co/HLNJBEbcJV
🇺🇦 #StandWithUkraine 🇺🇦 pic.twitter.com/FwRvFrbyLb

— Ministry of Defence 🇬🇧 (@DefenceHQ) June 20, 2022