Wireshark and Fiddler are both exceptional tools that serve vastly different purposes focusing on different OSI layers. Fiddler is an HTTP(S) proxy and Wireshark is a packet sniffer. While you can probably achieve in Wireshark what Fiddler offers, it's going to be an utter pain in the ass.

If you want an open-source alternative to Fiddler, consider mitmproxy [1].

[1] https://github.com/mitmproxy/mitmproxy