I have made a map for use with Collector. I would like to use attribute expressions to provide some information to survey teams. One of my attributes uses the feature Shape__Length attribute, but this does not seem to be available in Collector when I am working in an offline area (it works when streaming over WiFi), either for features digitized in the app while offline and for features downloaded from online. I would really like to be able to use Shape__Length, but it seems to be unavailable (see question from 2018 linked below). Evidently the app can calculate feature lengths as this is displayed e.g. in the title of the popup, but how do I get to it?