Season 5 of Agents of SHIELD introduces us to Enoch, who physically sends most of the agents to the future.
In an effort to help the Agents he has sent to the future, he works with Fitz to provide weapons and a cryo-frozen Fitz hidden in the Lighthouse.
In the future, Enoch works with the restored Fitz to help rescue the agents and send them back to the present.
Enoch doesn't survive the mission to return home,
Fitz is sent back with the rest of the team.
While we're not told exactly when they've returned to, it appears to be some time after their disappearance. The agents meet the second Chronicom, Noah, but Enoch does not seem to be present.
In the present day, even though future-Enoch wasn't sent back in time, present-Enoch should still be around somewhere, and there should be a cryo-frozen Fitz in the Lighthouse.
While Hale may not believe Coulson's story about time-travel, meeting Enoch may help convince her.