Flatpaks are a way to get applications on Linux. The advantage of Flatpaks is that they are independent of the system package manager.
We recently decided to not support both Snaps & Flatpaks as we got most applications in Chaotic-AUR already / AUR has it all usually. You can request packages to be added to Chaotic-AUR by creating a GitHub issue at the packages repo.
If you absolutely need another source of applications, Flatpak should be the one used - helpful is its Archwiki page.
Since fish doesn't use /etc/profile.d, Flatpaks won't work right away (eg. applications don't show up in the start menu). There are 2 possible workarounds:
sudo pacman -S bass-fish
for file in /etc/profile.d/*.sh
bass source $file
end
The preferred workaround is the first one as it is faster and works natively with the environment variables due to bash starting before fish does.
💡 This only concerns installations older than 210627, since this release we use bash as a login shell & fish in terminals only.