I have seen this posted several times but have not found an idea post for it.
I would like to have my Arcade expressions generate real data on export. I understand that may be slow at times.
Or at this point are we just waiting on attribute rules to come to AGOL? It would solve all kinds of issues I have with Arcade not being "real" fields. I had seen a post it was due out this year but cannot find it. I also heard they are working on them for Field Maps (offline is tricky).