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Need urgent help - scattermap over COVID-19 chloropleth map

I have created a chloroplethmap using figure factory. This chloropleth map represents the COVID cases in different US counties. I am pasting my code and output below. I want to plot lat/lon data on top of this as we want to study which of our centres are at risk due to COVID and whats the degree. I am facing trouble plotting the lat/lon dots on top of chloropleth trace. Please can someone help me resolve this asap.