Germany no longer builds new hulls, but instead refurbishes and upgrades existing Leopard 2 hulls from stocks to new standards. As far as all upgrades are modular any existing Leopard 2 tank can be upgraded to the latest standard. By 2022 hulls of this tank were still manufactured in Greece.
https://www.military-today.com/tanks/leopard_2.htm
Feb 16, 2022 So I don't know how far this progressed
According Ptisi magazine, KMW, in collaboration with Rheinmetall, are proposing in Greece a package of agreements based on a common point of interest, which can go as far as the construction of a Leopard 2 assembly / production line in Greece, utilizing the existing infrastructure, since such does not exist. This line will also serve the reconstruction of the Greek Leo 2A4 at a higher level, up to the Leo 2A7, if this is finally deemed economically feasible.
The homogenization of the fleet of the Greek Leopard 2 Leo 2A7, allows Greece to develop into the main user Leopard 2A7 worldwide.
However, in addition to the main upgrade program of the Leopard 2A4, the German side is said to propose the participation of Greece in the TOMA Lynx program, while on the table is the acquisition of a large number of used armor of various types, which are now in storage in Germany, including significant quantities of Marder 1A3.