I m not able to open snap application it shows kernel feature Missing dbus ,network

given that kali is not designed for day to day use but as a toolbox for network analysis that you’d only use temporary, it is no surprise that its kernel is missing security features … snaps however will adjust fine for this and simply run with degraded security in that case …

if you copy/paste the error you get in your terminal into the search field of this forum, there are plenty of threads discussing it, most likely the snapd.apparmor.service is not running … enable it and your snaps will likely start working …

also, do not run desktop applications (not only snaps) with sudo unless you have a very good reason to do so …