How to loop a panel with a variable using Google Sheet data source

Hi,
I’m using grafana Cloud…
and I’m not sure… but I new confirm of someone else…

It seems to me that it is not possible to use variables with a data source of type “Google sheet”?

I define 8 vars

'cause isn’t possible with a query on Google Sheet, right?

Now I got this panel…
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I use to loop with vars using for example prometheus data source…
but using Google Sheet seems no possible.

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'cause also… it is not possible to filter the call to the sheet since i can only define a range. I just want a confirmation of the impossibility of the operation.

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Naturally, I filter it on transformation… but it’s a manual operation…

here below… the Value BM01 can be only accepted as hard code insert?
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In conclusion, if you give me confirmation… is it not possible to use variables to replicate a panel with this type of data source, as I already do for Prometheus for example? Do I have to duplicate the panel 8 times filtering by hand? Do you have any other ideas to manage only one panel dynamically, I will surely cache the first one to save calls to the same data.

Thanks, ALEN