U2723QE, two daisy chain, difficulty switching Input Sources on 2nd U2723QE

I have two Dell U2723QE monitors. Using the daisy chain feature, my Dell XPS laptop is connected to the first U2723QE, and the second U2723QE is connected to the first one via DisplayPort. This setup works well.

For my new business, I have a Huawei laptop connected to the second U2723QE via Type-C.

In the first setup (Dell XPS + two U2723QE monitors), everything works fine. However, in the second setup (Dell XPS + first U2723QE and Huawei + second U2723QE), it's not easy to change the input source using Dell Display Manager. The only way to switch from DisplayPort to Type-C is by manually pressing the buttons on the monitor.

Additionally, Dell Display Manager supports "change input" for the Master U2723QE only. When I select the second monitor in DDM, the "change input" option is greyed out.

Is there a shortcut to switch inputs in the first setup? In the second setup, since the second U2723QE is the master monitor for the Huawei, I can switch the input source back to DP using the keyboard. However, in daisy chain mode, I can't change the input source of the second U2723QE. Any suggestions?