Macbook pro disable charging when connected to external monitor via thunderbolt 3 port
I spoke with Apple chat support. They did not have a solution for this issue.

My tested and working solution is as follows:

I bought 2 things


HDMI Cable (one end connected to external monitor)
USBC to HDMI converter (one end connected to macbook)


Now, the macbook does not charge because of external monitor connection.