More Power BI dataflows available in Power Apps than Excel or Power BI

Using the Power Platform connector, I see different a different set of dataflows in Power Apps than I do in Power BI or Excel.

I'm trying to pull a dataflow into Excel. However, when I use the Power Platform dataflow, I only see a subset of all workspaces that have a dataflow:

I see the same thing when building a query using Power BI desktop or service.

However, when I build a table for a dataflow (standard or analytical) in Power Apps, I see all of the workspaces I expect to see:

I am an admin in the workspace called DRE PMO, and also in the workspace called FTL Sapphire R2 and TKA 1.0 KFP Release. Access doesn't seem to be the cause.

Why don't I see the full list in all query building tools?