Question about Elgato Thunderbolt 3 Dock

No, or rather only by transferring the USB-C cable from one device to the other. The cable that is included is relatively short. The dock is not a switch for different PCs. It is connected to the MacBook or PC with a USB-C cable and the advantage is that all other connections are on the dock. That means you can easily attach/detach the MacBook and take it with you and all devices (headset, external hard drive, monitor, network cable etc) remain in the dock. So much for the idea... but I can't really recommend it. I had crashes with my MacBook, contacted the manufacturer and exchanged it (assuming it was a defect in the dock). My 100 CHF cheap adapter works more reliably and I retired the dock.