Just experienced this today, used an Arcade expression to provide logic for symbology and the features no longer appear in Collector maps. Would love to get an 'official' answer on this?
Looks like a future version of Collector will support Arcade expressions. According to the blog post, you'll see Arcade support coming to more apps coming up.
Over time you’ll start to see Arcade supported in more apps, and it will crop up in more places to enable you to do more than just customize the presentation of your data. We have some really exciting things planned so stay tuned.
I don't have any timeframes though.
I confess to researching the use of Arcade Expressions after starting a field collection project. I certainly wish COLLECTOR will soon be able to take advantage of expressions. Here is the back story.
This item is over 2 years old and still does not appear that Collector, or Explorer, support maps symbolized using Arcade expressions. Is anyone aware of the time frame for when this might be implemented?
Micheal they will not have Arcade expression available for the current collector app. They should have it available with the Aurora project Collector App which it is still in Beta for IOS and android.