Can presidents grant the reprieves and pardon for offenses?

The president has pardon or clemency power under Article II, Section 2, Clause 1, of the U.S Constitution, under the Pardon Clause. The clause says the president “shall have the Power to grant Reprieves and Pardons for Offenses against the United States, except in Cases of Impeachment.” While the president’s powers to pardon seem unlimited, a presidential pardon can only be issued for a federal crime, and pardons cannot be issued for impeachment cases tried and convicted by Congress.
For instance, on October 6, 2022, Biden pardoned all those convicted of the prior Federal offenses of simple possession of marijuana with the exception of non-U.S. citizens and those who were considered illegal immigrants at the time of their arrest.