I have used shared facts a lot in RM particularly for census records so that I can add a lot of detail to the “head of household” and then share it with other members of that census indicating their relationship to the head via the role field. This is the way that the team explained in a webinar how shared facts were intended back in RM6 I believe.
Thus it was a shock to discover that shared facts are not searchable and do not appear in some reports. This seems a big oversight and suggesting that the solution is to copy the fact into each record duplicating information that if altered will need changing in multiple places seems wrong. It also loses the role/relationship information.
It is also much harder to select the correct people to “share” with as the ability to see and move around a family group which was fantastic in RM7 has been removed.
I am not sure how that would help, if for example I wanted to find all the people present in the 1921 census, and I used the criteria you suggest it would find the head of household who has shared facts but not the people with whom the fact is shared - wives, sons etc.
If i understand what you are looking for – the only real option would be SQL-- you could create a group via SQLITE then work from within RM. The group would need to be refreshed using SQL — depending on how you do the criteria - this might be several times per week
It is a good suggestion BUT for now , you only option is what Renee has suggested or what is suggested here on this thread–note so far I have NOT found where you can make a report/group/color code based on one fact such as 1921 census and have all people who have this fact show up…