I made a copy of the Chekk sample app to trial publish as a mobile web app.
The formatting in the live preview within the thunkable app is fine … but the formatting in the mobile web view has different line spacing in the label/switch list, being almost triple spaced compared to the live view … and when viewed in a desktop browser, the font sizes, field widths and list row formatting are all off. Note the wider line spacing between the switches on the live test vs. close spacing on mobile web version. There seems to be no way to change this via margins or padding. Any help appreciated.
One tip: use fit contents on rows vs. fill container to keep the parent row from being MUCH larger than the dynamic columns inside.