It's not possible at this time. I can't find the thread, but I remember at some point Roll20 Staff/Devs stating that 'container' inventory was a larger task to implement than was feasible at this time. If it's already possible with the various 'packs' then I'm not sure why that would be such a huge lift, but I'll have to trust that it has to do with the backend infrastructure of how Beacon sheets organize and calculate the data, and other competing priorities on the sheet. As a point of comparison, D&D Beyond didn't get functioning containers until 2021, and people had been requesting them for MANY years at that point. The D&D 5E 2024 by Roll20 sheet is still relatively new (in comparison), and there are a lot of features and other core functionality still being added, so I'm still hopeful that it's on the roadmap.
