If you cannot find the for the actual update, there is a physical alternative. The launch edition cartridges of Minecraft (Cartridge ID ending in -000) contain the Legacy base game. However, the moment you connect to the internet, the Switch forces a download.

Minecraft Nintendo Switch Edition Nsp Actual Upd [repack] Instant

If you cannot find the for the actual update, there is a physical alternative. The launch edition cartridges of Minecraft (Cartridge ID ending in -000) contain the Legacy base game. However, the moment you connect to the internet, the Switch forces a download.