The "Compare the contents before translating" step (T241589) in the Section Translation workflow is intended to be supported on both mobile and desktop. Although the initial scope is to support the mobile layout, responsive adjustments will be added for it to better fit larger screens.
Specific details on how to support each component are available in the parent task: T241589: Section Translation: Compare the contents before translating
Related: T259689: Orchestrate the workflow in responsive manner