>Germany and Poland were in a standoff on who would send tanks first. Did I get this right?

No. Countries that buy the Leopard agree to follow German arms restrictions and everyone was waiting for permission from Scholz to send their used, older model tanks to Ukraine. Scholz asked the US to put their money where their mouth is and send Abrams first, which they agreed to. Now Ukraine is getting 30 Abrams and about 100 Leopards.