“Not see beyond the end of one's nose”in other languages

Same idea, different pictures

Chinese and Korean share a frog at the bottom of a well, 井底之蛙, 우물 안 개구리. It comes from the Chinese classic Zhuangzi: the frog thinks the little circle of sky above its well is the whole sky.

English keeps it closer: someone who can't see past the end of their own nose.