score:1

finally I found a solution. I want to thank @RenaudLN. The post in Plotly Question reminded me of the possibility to use prefixes and suffixes. The following code solved my issue

tick_Sett_Y = {
            "tickprefix": r"$" ,
            "ticksuffix": r"$",
        }

tick_Coll["yaxis1"] = tick_Sett_Y.copy()

# apply changes
fig.update_layout(tick_Coll)

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