Russia-Ukraine war live: Germany ‘not blocking export of Leopard tanks’, says EU foreign policy chief | Ukraine | The Guardian

This is most likely because Poland announced they were sending their Leopards to Ukraine WITHOUT German permission.

https://www.theguardian.com/world/live/2023/jan/23/russia-ukraine-war-germany-expects-decision-soon-on-delivery-of-tanks-to-ukraine-zelenskiy-vows-to-fight-corruption-live