Hi. I made a survey in the Survey 123 Web App with many questions, including multiline questions. However, when I go to the Data tab, all the questions appear except the multiline ones. When I export to an Excel file, those questions do not appear either. I am able to see the questions on the Analyze tab, though. Thanks in advance.
Maybe try to click the plus button on the upper right of table in Data page to see if your multiline question is there.
If it is not there, then that's where this question gets weirder. If you can see the missing questions on Analyze page, it means the questions are in your survey feature layer and it should be on Data page.
Therefore, if the above does not solve your issue, please share more with me about your survey so I can author a survey the same as yours to reproduce this issue.