Animal Crossing- New Horizons -nsp- -2 Dlc- -4-... _best_

It looks like you're referring to a file name for in NSP format , likely including 2 DLCs and a version like "4" (possibly update v4.x.x or a bundle reference).

When docked on a Switch 2, the game runs in native Animal Crossing- New Horizons -NSP- -2 DLC- -4-...