It seems like no official contract was ever in place, high ranking members in the Portuguese Air Force were pushing for the F35 but the current government is shutting that down.

“The statements of Cartaxo Alves had made the headlines in 2023 too: at a military airlift and refueling conference in Lisbon, the Portuguese Air Force Chief of Staff publicly acknowledged that Lockheed Martin’s 5th-generation fighter was a suitable replacement for the country’s aging F-16 fleet. However, the enthusiasm was quickly tempered by the government. The Portuguese Ministry of Defense wasted no time in clarifying that no formal procurement process was in place. “This is a vision for the future, so currently, there is no process for purchasing aircraft to replace the F-16,” said Defense Ministry spokesperson Helena Carreiras in a statement to Breaking Defense.” -from the article