Hello there, TUSSU.

I appreciate you for adding some information about your concern. Allow me to chime in and share some information on showing the funnel icon in reconciling bank transactions in QuickBooks Online. 

Based on the attached file, I can see that you'll need to enter the ending balance and ending date. Then click the Start reconciling button. By doing these steps you'll be able to see the funnel icon and begin reconciling.

I'm adding this reference that'll guide you anytime you need help while doing or fixing reconciliation: The reconcile workflow. 

I'm always available if you need clarification about reconciliation. The Community is always available 24/7 to assist you. Have a great day!