How Can I Propagate Filters from a Parent Layer to a Related Table in ArcGIS Online?

[YuriWalsh]

I'm currently working with related datasets in ArcGIS Online, where I have a parent feature layer (e.g., "Sites") and a related child table (e.g., "Inspections"). The parent records contain important attributes — for example, a field that marks a site as "deprecated" — but this attribute does not exist in the child table.

In my workflow, I need to filter out inspections (child records) that belong to deprecated sites (parent records), but I'm running into limitations with how ArcGIS Online handles relationships and filtering across layers.

So far, I’ve noticed:

• The relationship is recognized in the attribute table and in pop-ups.

• However, filters applied to the parent layer do not automatically filter the related child table.

• There doesn’t appear to be native support for propagating filters from the parent to the child in  dashboards.

Has anyone found a workaround or best practice for this?

• Is there a way to simulate filter propagation across related layers in ArcGIS Dashboards?

• Can this be handled with views or Arcade expressions?

• Or is this something better handled in external tools like Power BI, where relationships and filtering are more flexible?

I’m trying to avoid duplicating attributes in the child table if possible.

[YuriWalsh]

I tried a different variation of arcade, but I keep getting the "Unable to execute Arcade script" warning. I am wondering if the arcade logic is not supported in dashboards. I also wonder if anyone has had success creating a "joined" feature set... 

Thank you again for your help! I'll keep you posted if I ever figure something out!

[RPGIS]

There is a way to do this and there are two ways, at least to my knowledge, that can work to achieve this.

1. Using the List method:
   1. Use @AustinAverill suggestion to create a new dataset as a data expression.
   2. Once the data expression is created, add the list to the dashboard.
   3. Once the look and feel of the list, set your layer action to filter that specific list using that common attribute
2. Using the Category Selector in the header:
   1. Step 1:
      1. Add the header to your dashboard
      2. Once added, select configure (upper left hand corner of the header) and select the category selector
      3. In the category configuration, select grouped values.
      4. Select the parent table
      5. Select the field that has the relational information in both the parent and child table(s)
   2. Step 2:
      1. After completing step one, follow the same steps as Step 1 but for the child table
      2. Apply a filter to the child table based on your specific criteria
      3. Set the field to which value you want the layer to be filtered/selected
   3. Step 3: 
      1. Once the category selector is configured, go back to the first category
      2. In the Actions tab select the filter option
      3. Set to filter the child category selector.
   4. Step 4 (Optional):
      1. Configure the child category select Action to filter other tables(s) if applicable.

Note: For the category selectors, it is best to name each item in the general tab under selector options, so you know which item to filter.