The Switch 2's new 'handheld mode boost' won't be available for Tomodachi Life: Living the Dream because the game already runs at 1080p — 'You can play at a higher resolution (1080p) than using handheld mode on Nintendo Switch, regardless of whether Handheld Mode Boost is enabled or disabled', Nintendo says

Nintendo has confirmed that Tomodachi Life: Living the Dream won't support the Nintendo Switch 2's new resolution boost feature.