A federal ICE officer did raise a new American flag at an ICE facility in Portland after protesters burned the previous flag on the Fourth of July.
A patriotic ICE officer raised an American flag at a facility rioters targeted over the Fourth of July.

FactVerify
Source: factverify.com
What the Evidence Shows
The claim states that a patriotic ICE officer raised an American flag at a facility targeted by rioters over the Fourth of July. According to the source from Halla Back, on Independence Day, protesters burned the existing American flag at an ICE facility in Portland, Oregon. In response, a federal officer replaced the burned flag by raising a new American flag at the facility.cbsnews.comcbsnews.comSuspects used graffiti, firearms, body armor in Fourth of July ambush outside...
This confirms that an ICE officer took patriotic action by raising the flag after it was destroyed during protests on the Fourth of July. Other sources describe violent attacks and ambushes targeting ICE facilities and personnel around the same time, including in Texas, but do not contradict or dispute the specific incident of the flag being replaced in Portland.hallaback.comhallaback.comPatriotic ICE officer replaces American flag after protesters burned existing...
ice.govice.gov10 suspects charged in July 4 attack on Texas ICE detention facility+1 more
Therefore, the claim is supported by credible information and is true as stated.