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Long-ish article with photos, and fairly lot of info:
https://www.thedrive.com/the-war-zone/m1-abrams-and-leopard-2-tanks-will-officially-be-headed-to-ukraine
Basically by March (or at least by a spring offensive) from international contribution they want to set up two German style tank battalions, from about 80 L2s. Germany, Spain, Poland, Finland, and Sweden would donate those. Germany will also provide logistics, ammunition, and maintenance; training will be done in Germany. Basically it's an EU contingent with Ukrainian crew. Maybe even the paint for unit designation or insignia will be given by EU. Well it's like with any other Western provided weapon systems.
Other:
US promises 31 Abrams - this delivery will take months, so perhaps by summer when the L2s were ground down.
France Leclercs and UK Challanger 2s, a company each
Czechia and Northern Hungary sends their Soviet stuff, and receives L2s from Germany.