Question about Dell P2425HE

To create a daisy chain with the Dell P2425HE and another monitor such as the P2425H, you need a connection via DisplayPort, as HDMI is not suitable for daisy chaining. The P2425HE has two DisplayPort connections, which theoretically enables daisy chaining. However, it is important that the monitors support DisplayPort 1.2 with Multi-Stream Transport (MST) in order to operate multiple monitors in a chain. Connection via USB-C is possible if this connection supports DisplayPort Alternate Mode, which is the case with this model.

To answer your specific question, you can connect the P2419H to the P2425HE via DisplayPort and then connect it to the laptop via USB-C, provided that the USB-C interface supports DisplayPort Alternate Mode. However, it is important that all devices involved fulfil the necessary requirements for daisy chaining.