Hi @Brad -
Unfortunately, it's not possible today to embed Dash in a Databricks notebook cell without our Enterprise-level databricks-dash library. Longer term, we are working towards Dash natively working within Databricks notebooks, but that timeline is TBD.
Dave (previously in this thread) and I work with many Databricks customers who are looking into problems like this -- would you be open to a 30 minute chat so we can help talk you through some alternatives.