Hello @unica3602,
Infographics and reports are filtered based on the selected country and data source. For example, there are two data sources for Spain here:
If you create a report while working with "AIS Group" dataset and switch to "Standard", those reports will be filtered out based on the data source. That's why you can't see all reports under Build Reports or Build Infographics because these reports contain variables from different data sources that can't be mixed.
You also mentioned switching projects affects the reports list. This is because when you open any project, it will automatically open with the last selected country and data source used with that project. You can simply switch back to the desired country/data source and all your reports will be available again.
So please pay attention to the country/data source selection when building reports and infographics. However, if your goal is to run all these reports and infographics regardless of the data source, go to Preferences and enable these options under Classic Reports and Run Infographics:
When these options are enabled, all reports you created using AIS Group and Standard data sources will be available under Run Reports and Run Infographics.
I hope this is helpful!
Fasil
BA Team