How to move a specific chart to a new sheet in Excel?
or Copy Chart to New Sheet and Link to Data on New Sheet ...
or any one of a number of results from the search https://duckduckgo.com/?q=excel+copy+chart+to+different+sheet
Since it sounds like all you want to do is to isolate the chart, not change the data it uses, you will simply do the copying of the chart and allowing it to reference its original data. Any of the steps about making it use new data on the new sheet will not apply to you, and that's actually far more complicated than the copy.
If you're used to using Excel with NVDA then there's really nothing NVDA-related, per se, about doing this. It's all Excel commands.
Brian - Windows 10 Pro, 64-Bit, Version 20H2, Build 19042
The depths of denial one can be pushed to by outside forces of disapproval can make you not even recognize yourself to yourself.
~ Brian Vogel