One other thing to keep in mind is that most of the channels will not keep their entire library of content available indefinitely. Season one of Harley Quinn the animated series aired in 2019. Adult Swim only has the current season (two) available for streaming / on-demand, even through the Global TV App which is where Adult Swim content is available directly. Rick and Morty is going to be similar except they have fewer episodes available. Optik on demand actually has more episodes from Season 4 than Global does.