Hi,
I'm a galaxy S7 Edge (Exynos) user. I recently ported it to installled Ubuntu 20.04 on it. I can assist you if something needs to be tested in the s7 edge variant.

I realize this thread is a year old, but I have successfully ported installed an S7 Edge SM-G935F (Exynos 8890 Variant) to with Ubuntu 20.04 devel version using the UBPorts Installer for hero2lte. "herolte" is for Exynos S7 flat variants, use "hero2lte" for Exynos S7 Edge

You can find the installer in the link below:
https://devices.ubuntu-touch.io/device/hero2lte

The windows 10 installer failed to detect my device in download mode (libusb error: -12). So I had to flash the os with the Linux edition of UBPorts-Installer using a virtual machine (Oracle Virtual Box with Ubuntu 20.04).