In AGOL, using VISUALIZATION - Configure Pop-up, I expected that both (1) Fields set to Display OFF and (2) field reordering, would be applied in Survey123 for ArcGIS interface, but all i succeed having is the Alias renaming. Other ways of doing that? Thanks
The field visualisation settings in web maps under configure pop-ups do not apply to Survey123 directly. In Survey123 you need to configure the survey how you want it to display on a question by question basis. There are several ways you can achieve what you are asking. If you do not want to see these fields at all (hidden in survey) and they are not required by users to be answered, you can simply remove them from the xlsx form.
If you want them to be visible to the user and based on the answer of another question, you can use relevant expressions on those questions.
Hope this helps.