Alternative to sub rows?

I’m using Grafana Cloud and my dashboards make use of collapsible rows to group panels into categories.

My goal is to create a row, e.g. “Lead Time Analysis” with a few key panels and then have a sub-row for “Lead Time Drilldowns” which contains lots of detailed panels.

Since it seems that you cannot create a row within a row, I wonder if there’s an alternative way of doing it?

I’ve attached a screenshot for clarity.

Thanks.