Editing chart in google sheet using pygsheet python

Question

I am trying to analyse data from a google sheet using pygsheets wrapper and able to draw a line chart using same. The idea is to run data analysis on daily basis and add/update the chart accordingly.

Here is the data with ranges in Google sheet, python code I am trying with pygsheets and the chart I am getting using pygsheets.add_chart()

        # Inserting/Updating chart
        chart_title = "Title"
        # Range is dynamic, here is a sample range, check resp. sheet SS
        chart_range = [('F6', 'L6'), ('F7', 'L7'), ('F8', 'L8'), ('F9', 'L9')]
        chart_anchor_cell = 'F2'
        chart_domain = None
        
        # Check chart's existence
        found_charts = wks.get_charts(chart_title)
        if len(found_charts)!=0:
            print("Chart Found. Updating chart...")
            chart_obj = found_charts[0]
            # NOT SURE HOW TO UPDATE IT'S VALUES LIKE UPDATED RANGE, LEGEND, X&Y axis
            # .....................................................................
        else:
            print("Chart not Found. Creating chart...")
            chart_obj = wks.add_chart(domain=chart_domain, ranges=chart_range, title=chart_title,  chart_type=pygsheets.ChartType.LINE, anchor_cell=chart_anchor_cell)
            chart_json = chart_obj.get_json()
            # NOT SURE HOW TO UPDATE IT'S VALUES LIKE LEGEND, X&Y axis title, SIZE
            # .....................................................................

As the domain element is None, I am not able to use methods update_chart() and get_json(), so it seems impossible for me to update chart's attributes.

Can anybody, please tell me that how I can update chart's values with a Chart object?

Thanks in advance!