Yes, Ukraine is losing tanks, including some of its best tanks. No, it’s not running out of tanks.
Ukrainian Crews Will Be In Britain 'Soon' For Training On
Challenger 2 tank count dwindles as British Army is left with just
British Challenger 2 tank destroyed in combat for first time, Ukraine
Challenger 2 tank count dwindles as British Army is left with just
Ukraine loses first Challenger 2 tank in counter offensive
Challenger 2 — Вікіпедія
Challenger -1 / -2 / -3 (Egyesült Királyság), Page 47
Challenge Ends! Ukraine Loses Its First UK-Supplied Challenger 2
Britain denies doubling number of Challenger tanks for Ukraine