Further to this post here: https://community.esri.com/t5/arcgis-survey123-questions/is-there-a-way-to-disable-the-wastebasket-and-plus/m-p/1268367
The ability to prevent deletes and adds to repeats when a survey is opened for editing using query allowAdds=false is available for the mobile app only currently, since the addition of the ability to edit in web forms was created, this would be a very welcome addition!
For my case, we're using repeats in a form that I then have embedded in an Operations Dashboard for supervisors to approve the work that has been done. Because of the way the survey is set up with repeats the repeat is currently where the approval question is so it is visible in the review survey. Getting rid of the plus sign and garbage can would greatly reduce the chances for accidents with the data.
Thanks!