I have double confirmed that Ukrainian TB2s are not destroyed. They are in good condition and they are running sorties. Ukrainian Armed Forces are using TB2s cautiously for mostly recon missions. TB2s played a big role in some of the Ukrainian victories by sending valuable recon videos. TB2s are used at least one time to hit a Russian military convoy similar to the Karabagh war. Turkish MoD asked Ukrainian MoD not to release footage of TB2s due to sensitive relations with Russia. Turkish MoD doesn't want to further humiliate Russia and show their killed military personnel. Ukraine MoD also doesn't want TB2s to be high on the Russias target priority list. Currently, TB2s are one of the most valuable assets Ukraine has. There is also Turkish weapon support going on. A Turkish A400M delivered MAM-L, Stinger, and ammo to Ukraine via Poland. This is of course not official but we know because a Turkish A400M landed at a Polish airport close to the Poland-Ukrain border.
It seems like Russia will bleed. As this war continues, I expect Russia to go into the insane mode in the coming days and level complete city blocks(similar to the coalition's Raqqa siege) as their losses increase and its patience runs thin. The war won't end if Kyiv falls.
BTW Russia executes additional cruise and ballistic missile strikes on airbases they think TB2s are operating from. Yesterday several airbases are targeted by such missile strikes.