If you find an old, untouched Eternal Collection NSP from 2019, you are missing out on nearly 80% of the game's current endgame. Blizzard has continued to support Diablo 3 on the Switch long after its initial release. Here is what a fully "Updated" version (usually version 2.7.7 or higher) provides:
Diablo 3: Eternal Collection NSP – The Definitive Guide to the Updated Version