Replacement parts simply aren’t available ... I had the connector peeled back and was able to identify the problem. The cable of the Macbook charger consisted of a centre conductor sheathed ...
Go for at least a 100W cable for the 14-inch MacBook Pro. While 100W is fine for a 16-inch MacBook Pro, that model can be charged at up to 140W, although Apple restricts fast-charging for that ...