I have a 10 x 10 km grid feature layer hosted on ArcGIS online. I plan to use this grid with the Collector app. I want users to be able to click on a grid and add an observation. But I want them to be able to make multiple observations in any grid. So for example, Grid A currently has 0 observations. A user clicks add observation and Grid A becomes 1 observation. Another user clicks on Grid A and adds observation again. Now, Grid A becomes 2 observations. Is there any way to accomplish this with some clever Arcade function or customization of the grid domains/fields before it is published to ArcGIS online?