Not just Polish and other third-party ones, but Germany herself will also deliver. Sorry, not yet available in English. My translation of the lede:
After months of debate, Chancellor Scholz has finally found it in himself to deliver main battle tanks to Ukraine. The allies will apparently follow suit as well. From the US, Abrams tanks might come.
It’s clear that Biden’s decision to send the Abrams was what allowed Scholz to do what he must have been wanting to do for months, but refused to do alone. Even if sending the Abrams is probably more symbolic, since as a weapons system they remain somewhat impractical for Ukraine.