Thanks for your help guys, the quick responses were great!
Yesterday as I was typing up a response to your questions and I realized that I was overthinking my approach to getting the information I wanted.
I am adding my own fields to the row settings form and was using another old field I had worked with before for saving post-specific meta. While that was useful for taking info from BB’s frontend and attaching it to CPTs, I realized it was just getting in my way with this plugin.
I took your advice and started looking directly at the Beaver Builder draft meta as well as the data and got what I was looking for.
For a little bit of context: the plugin I’m working on acts to link up several rows to one another as per user input. The reason for my question was that I needed to be able to access from one row form to the next what the user had input in a given row before the page itself had been saved (the info they set needs to potentially be available across all rows).
With this step out of the way I should hopefully be able to finish up the plugin pretty soon and show it off!