Make Yubikey being recognized by KeepassXC on Ubuntu
After you installed KeepassXC on Ubuntu using snap you might recognize that your yubikey would not be recognized at all by KeepassXC. This could be reduced to two separate origins. First is a missing library that must be installed. Second reason is related to security. For beeing as save as possible it is not permitted to access the ubikey from within keeepassxc if it has been installed via snap. To eliminiate this problems you need to execute two seperate commands in a terminal session.
sudo apt install libyubikey-udev
sudo snap connect "keepassxc:raw-usb" "core:raw-usb"
After that your yubikey will be recognized by keepassxc.
Have fun!