Ukrainian President Volodymyr Zelensky confirmed today that US Abrams tanks have arrived in Ukraine:
"Good news from Minister [of Defense Rustem] Umerov. 'Abrams' are already in Ukraine and are getting prepared to reinforce our brigades. I am grateful to our allies for fulfilling the agreements! We are looking for new contracts and expanding the geography of supply," Zelensky said in a Telegram statement
The Pentagon has confirmed that Abrams have indeed arrived in Ukraine. The tanks had been in Germany for refurbishment. The Biden Administration has committed to sending 31 Abrams and at this point less than half of them have arrived, but US officials confirm that the rest will arrive over the next several weeks.