In advanced tab, layout options you can specify Plotly layout options there. See this reference of Plotly for complete layout options. In your case, I think you need a margin from left side so there is more space to completely display the name.
I was able to do so in a line chart. See the available options and try out ones which work for you. Hope it helps.
You can specify layout options like this:
{
"margin": {
"l": 50,
"b": 50,
"t": 0
}
}