Are "received selection" external expressions supported in logic block builder for HD structures?

I want logic to run for selected detail rows selected within an HD structure. I’ve tried adding a received selection filter to my “fetch detail records” action in UI logic over the HD table, however nothing gets returned when I debug. Am I trying to do something that is not supported? If this use case should be supported, could someone point me to a working example?

Based on the subsequent chat we had, take a look at how the Patch Batch application implements its Pay field and consider pairing that with making this app one that enable Single-Click Entry Into Row Cells (release note Nextbot-5057) for the most seamless experience.

I just reproduced the original issue and am seeing selections made on the Detail List be available in a header form action logic block as the received selection. I’m not sure why it didn’t seem to be working that way when you originally tried that approach.

Huh interesting, I ended up using the single-select with a flag rather than received selection from the platform but will keep this in mind if we have another use case come up in the future. Thanks Ian!