"Deep Paper" is likely the title of the episode. Without more context, I couldn't find any information on what "Deep Paper" might refer to in the context of Superman & Lois. It could be a plot point, a location, or a theme explored in the episode.
The episode is available in 480p HDrip quality, which suggests it's a ripped version from a digital source, possibly a streaming platform. superman & lois s02e11 480p hdrip