In B2 exercise A Day in the country I thought ´passer devant’ means to pass in front of , no reflexi. the answer used it as reflexive but no pronoun

Hi Judy,

Passer devant can be to pass by or lit. to pass in front of -

In the writing exercise, you mention 

https://progress.lawlessfrench.com/my-languages/french/exercises/overview/62

Nous sommes passés devant un champ = We passed in front of a field

I don't see a reflexive pronoun there and neither in the first part of the lesson which is devoted to the verb passer.