Mohammad,
One way I found to make a bubble chart in Qlik Sense is to use the Scatter Plot with two dimension and one measure. Despite that scatter plots are supposed to have two measures, I use another dimension in one of the measures, like Date, or MonthYear, and it creates a time line for example. The bubbles do not change according to the size of the measures, but it places them correctly in the chart. Find attached a sample chart. I hope it helps.

LD