https://app.handelsblatt.com/untern...w-ueber-den-export-des-panthers/28970680.html
I doubt that will really happen, but news is news... Rheinmetall is in talks about selling the KF51 Panther MBT to Ukraine. So far only a prototype of that exists, but Rheinmetall claims that they could start deliveries in 15 to 18 months (so summer next year).
The Panther is an industry initiative to create a successor to the Leopard 2, it rivals the government funded MGCS program which is a German/French cooperation led by Nexter and KMW. Rheinmetall is a junior partner in that program and apparently unhappy with it's role and the overall progress.
We have seen something similar before - Rheinmetall was involved in the state-funded and quite slow and expensive development of the Puma IFV and then created the KF41 Lynx as an IFV for the international market. The KF51 Panther in a way can be seen as its big brother.
So on one hand I doubt that this is going to happen, on the other we have already seen that Germany isn't shy to promise bleeding edge systems as soon as the general type of weapon system has got green light (IRIS-T SLM, RCH-155 as the successor to the PzH-2000)