Building Ethereum Chat App error on yarn ios

Hi, I’m following the ethereum chat app tutorial and get the error when I try to do “yarn ios” after installing yarn…

untitled folder 2 % yarn ios
yarn run v1.22.17
error Command “ios” not found.
info Visit for documentation about this command.

I’m also wondering where to download the folder shown in the video? I tried downloading the GitHub zip file and installing as folder but not getting the files as shown in video.

Thank you

can you paste the link from where you downloaded that zip from GitHub?

Yes it’s here:

this should correspond to that ios parameter: