Arch Linux

You can run scripts before/after pacman commands using hooks

https://wiki.archlinux.org/title/Pacman#Hooks

I use snapper. It takes snapshots not only triggered by pacman hooks but also on an interval or manually.

https://wiki.archlinux.org/title/Snapper

alias upgrayedd='<snapshot cmd> && pacman/paru ...'

OR

upgrayedd() {
    <pre>
    <snapshot cmd>
    pacman/paru "$1"
    <post>
}

https://aur.archlinux.org/packages/snap-pac-grub

The AUR package btrfs-autosnap does this. You define which subvolumes need to be snapshotted and how many it should keep of each. It adds a pacman hook that then takes a snapshot before updating.

I'm also on EndeavourOS and used this tutorial to do exactly that.

All you should have to do is

yay -S snapper-support btrfs-assistant

manjaro does this with timeshift. i think opensuse does as well.

I don't know the details, but CachyOS uses a pacman hook to do exactly that, so it's possible. It looks like there are AUR packages to do the same thing, but I haven't looked at them