Contracts for completing 36 quests in Standard/Premium Journey initially got released when the Journeys hit the game for the first time, after the Journeys ended, the contracts got disabled.
The contracts got re-enabled on July 19th 2022 and the progress continues since then. Quests completed after the Infinite Journey release, before re-introduction of those contracts, are not counted by design.
The Journeys now last infinitely, there is no time limit to complete the quests for the related contracts.