I also don't understand why the Ukrainians seem so fixated on the leo2s?
One possible reason.
Putin has stated they (Russia) wanted to de-militrize Ukraine, so maybe its the EU who is getting de-mililerized. Most if not all the EU's T-72's,BMP1/2 Arty vehs are now scrap on the battlefield thus the requirment for NATO AFV's.
Leo 2 and Challengers might be on the same list. They have reduced the M-777,humers,mraps, Javlins,Nlaws,UK Mraps, PZ2000 just to name a few, and they are not done yet, Bradlys are now up next, as well as M109's.
BO once stated" Russia has "esclation dominance", this has not changed.