The pardon power is granted by Article 2 of US Constitution:
The President ... shall have Power to grant Reprieves and Pardons for Offenses against the United States, except in Cases of impeachment.
The pardon power
include the power to grant pardons, conditional pardons, commutations
of sentence, conditional commutations of sentence, remissions of fines
and forfeitures, respites and amnesties
As you said, Anthony Levandowski was granted a pardon (not, for instance, a commutation)
The statement released by the White House (now seems deleted from the White House website, but can be found on archive.org here) says that (bold is mine):
Anthony Levandowski – President Trump granted a full pardon to Anthony
Levandowski. This pardon is strongly supported by James Ramsey, Peter
Thiel, Miles Ehrlich, Amy Craig, Michael Ovitz, Palmer Luckey, Ryan
Petersen, Ken Goldberg, Mike Jensen, Nate Schimmel, Trae Stephens,
Blake Masters, and James Proud, among others. Mr. Levandowski is an
American entrepreneur who led Google’s efforts to create self-driving
technology. Mr. Levandowski pled guilty to a single criminal count
arising from civil litigation. Notably, his sentencing judge called
him a “brilliant, groundbreaking engineer that our country needs.” Mr.
Levandowski has paid a significant price for his actions and plans to
devote his talents to advance the public good.
The official documents granting pardons are generally available here, but this website was last updated "December 24, 2020", so (I assume) it will take sometime before the pardon document related to Anthony Levandowski is available.
If you scroll, the President generally grants "full and unconditional pardons".
In general, as stated here:
a pardon is a full forgiveness of punishment
And, as stated here:
A full and unconditional presidential pardon extends to the remission
of restitution ordered by a court pursuant to 18 U.S.C. з 3551(b)-(c)
as a "sanction" authorized in addition to imprisonment, probation, or
a fine until such time as the restitution award is paid to the victim.
So it looks like the restitution was forgiven to.