So it appears that the question of removing or amending the ātitleā of a hover using unified hovermode has been asked multiple times without an answer on the plotly forum over the years:
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Adapt name in hovertemplate of stacked bar chart when hovermode = āx unifiedā?
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Plotly JS hover info: How to hide specific info in āx unifiedā hover
And more than a few times on stackoverflow:
I am building a fairly complicated dashboard where this issue comes up in three separate places. I am inferring from the lack of a solution that this is just not currently possible. I am not super familiar with the plotly development process, but is there a way to request that this functionality be added?