Once a staple of every broadcast network, the workplace comedy is slowing becoming an endangered species as streamers and cable take over. As more and more single-camera comedies mean there’s less of a need for single sets, the funny shows that centered on day jobs have slowly lost their dominance. However, a clever and unpredictable one remains on Apple TV+ in “Mythic Quest,” created by Rob McElhenney, Charlie Day, and Megan Ganz (collaborators on FX’s beloved “It’s Always Sunny in Philadelphia”). The first season built a loyal following through word of mouth and two smart standalone episodes—“Quarantine” in May 2020 and “Everlight” on April 16—helped keep interest high for a second season. There are times in this run when a sense of sophomore uncertainty about what to do now creeps in, but it almost feels appropriate as the entire team of Mythic Quest is dealing with the same problem.