There is no way you can do that in Qliksense.
Qliksense Autoadjust bar size according to number of values in Dimension.
However you can try Amcharts Extension. Refer below link.
Qlik comes with smart visualization as its visual get auto fit with respect to space and need. Lets say you have many bars and you need to make their width less to show each bar without expand but here Qlik smart visualization gives you a scroll option to move from left to right. Yes in Some BI tools it happens but try to use it as it is you will find its benifits.
Please mark the appropriate replies as CORRECT / HELPFUL so our team and other members know that your question(s) has been answered to your satisfaction.