Apparently only five of the 15 delivered PzH2000 are still operational: the others require repairs after the extremely intense usage they have been getting. The problem is that only small repairs are currently possible in Ukraine, and shipping them back to Poland is very time consuming and risky. Discussions about other possibilities ongoing.
https://www.focus.de/politik/ausland..._52139887.html
In the same article, they report that Ukraine claims at least 10 aircraft destroyed during explosions at Saki airbase and Russia claims destruction of one Gepard Flakpanzer and seven Himars near
Mikolajiw, and three fighter jets shot down in S Ukraine.