VAT - Multiple companies using same VAT # (VAT Group Reporting)

I have a situation where we have two companies are registered as a "VAT Group".

My questions there are:

1. Since the VAT group shares a common VAT # and I have these companies set up as separate legal entities - how does D365FO handle this situation?
2. Is there anyway to get any combined information for the VAT return?
3. Is it possible to get the combined information when using the MTD electronic VAT submission in D365?

At the moment we have had to combine the data manually and since using a VAT Group in the EU is a valid option I am interested if anyone can share how they have addressed that situation from a reporting standpoint?