ETF holding breakdown in diversification report

Most of my holdings are ETFs
ETFs are classified as “Unknown” in the diversification report
= The diversification report is pretty much useless for me.

I know you can allocate an Industry to an ETF, which I’ve done for VAP (Real Estate) but doesn’t make sense for ETFs tracking whole markets like VAS.

It would be great if the current ETFs’ underlying companies could be taken into account in the diversification report. It would obviously require to source that information from somewhere.
Morningstar is able to display ETF breakdown for Industry, Region, and Country as well as a list of holdings so it has to be available somewhere.
ETF holdings are also usually listed on the provider’s website.

A portion of these holdings will change over time (every 3 months?) so it would require refreshing the data from time to time.