A base version of Celeste (v1.0.0) lacks the Farewell DLC and Variants Mode. If you are seeking an NSP, you must also source the (v1.4.0.0). Without it, you are playing the 2018 launch build, which is significantly shorter and lacks the game’s emotional denouement.
If you installed an and the game crashes or shows a "Software closed because an error occurred" message: Celeste Switch NSP -UPDATE- -eShop-