Searching for keywords on ios

Hi -

I have about 40 GB of photos that I have added keywords to with who is in the picture. If I search for a keyword on photos for mac, no issue. If I do the same in photos for ios, nothing comes up.

Is there a setting I am missing? I'd like to upload everything and share the albums with my family, but would really like them to have the search capability.

Any help would be appreciated.

Thanks!!

Jamie