The Walking Dead: The Final Season is no longer available on the eShop, due to publisher Telltale pulling the game. The company released a statement saying The Final Season is being temporarily removed as it looks into how it can hand off the remaining two episodes to another company.
“… we have removed season passes for The Walking Dead: The Final Season from stores for the time being. We’re currently still working to find a way to hand off production of episodes 3 and 4 so that the season can be completed. The outcome of those efforts will determine when and how The Final Season returns to stores. We hope to have a firm announcement before the end of the week. For now, we apologize for any inconvenience.”
Source: Switch eShop