Piper
Piper is a GTK frontend for managing your mouse firmware via the ratbagd DBus
daemon.
Supported devices
It supports an exstensive list of devices including my Logitech G502 and Logitech MX Anywhere 2 mice.
Installation
On Arch it's as simple as sudo pacman -S piper libratbag.
On Ubuntu/Pop_OS just run
sudo add-apt-repository ppa:libratbag-piper/piper-libratbag-git
sudo apt update
sudo apt install piper