You might try using an invisible reference line.
In your example, right-click on the x-axis > Add Reference Line. Enter a constant value that will be your max value for the x-axis. I used 1, but if you might want to use a more representative value so that the axis doesn't seem out of place for viewers.
The reference line will force 0 to the left-hand side of the x-axis, but will otherwise be invisible and won't affect your automatic x-axis sizing.
Thanks for your response This is what I was looking at.