Capturing packets from other systems is not as straightforward as just starting a capture. Have a look at the following three articles:
- https://gitlab.com/wireshark/wireshark/-/wikis/CaptureSetup
- https://gitlab.com/wireshark/wireshark/-/wikis/CaptureSetup/Ethernet
- https://gitlab.com/wireshark/wireshark/-/wikis/CaptureSetup/WLAN
