Star Trek Picard: Every Easter Egg & Hidden Reference From 'The Impossible Box'

Soji uses a handheld scanner to date her belongings with everything coming up at 37 months old. This kind of quantum dating tech has appeared in Star Trek: Enterprise in the episode "The Expanse" where a simple scan could pinpoint the exact age of a material.

Soji later tells Narek that nothing she owns is older than three years and this is consistent with what Jurati discovered about Dahj's false identity way back in "Maps and Legends". According to Agnes in that episode, despite Dahj's records indicating she had grown up in Seattle and gone to the Regulus III Science Academy, there was no evidence she actually existed until three years prior.

Narek asks if Soji may have had false memories implanted, adding that it's not unheard of it. Indeed it's not rare in Trek canon. Not only did Data have the memories of the Omicron Theta colonists (through logs and journals) implanted in his positronic brain (see TNG's "Datalore" and "The Silicon Avatar"), Miles O'Brien had false memories of a prison sentence implanted in his regular brain in DS9's "Hard Time".