problem importing data from multiple sheets into single dashboard view

Hi - I've been playing around with using Excel for reporting and I want to create a dashboard for these reports. So far, I've created it by entering each cell with "='sheet name'!C1" etc, which is fine in principle, but as the number of project reports will vary month to month, and the sheet names could change, I feel like this could be somewhat unreliable and outdated pretty quickly.

Ultimately, what I want is pretty straightforward - I have a sheet named "Dashboard". On that sheet I want to start in cell A3 and populate my table.

In Column A I want to reference cell D5 on all the worksheets.
In column B, D1
In column C, D3
In column D, P3
In column E, D9
In column F, L9

That's the same on all sheets. However, there's a conditional formula applied in column G. At present, that formula is:
=IF(E4="R",'BES 12'!$D$21&"
"&'BES 12'!$O$21,'BES 12'!$D$11)

The idea here is that the cell populates with one reference if a project is flagged as red ("R") but another reference if it's flagged as either Amber ("A") or Green ("G"). This alpha value is, in itself, pulled across from other sheets and is in column E of the Dashboard.

As such, I'm a bit stuck on how to futureproof this, and make it so we can generate a dashboard based on a varying number of worksheets, all with different and non-sequential names (so the INDIRECT function won't work very well).

Can anyone help with this please?

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