“Do you have a link?”
No, but when the US has already sent 250 Abrams to Poland it’s not hard to think they can be easily given to Ukraine.
I believe the Abrams heading to Poland are replacements for their Leopard 2 tanks.
I have read that Germany and Poland are sending Leopard 2 tanks to UKR.
Poland should be sending Leopard 2s soonest.