After seeing these #AUR #PKBUILD:
https://aur.archlinux.org/cgit/aur.git/tree/PKGBUILD?h=element-desktop-nightly-bin
https://aur.archlinux.org/cgit/aur.git/tree/PKGBUILD?h=teams
Which basically downloads a DEB package, extracts the binaries and moves them to the correct places under /usr
I wonder: How many AUR packages do the same, and just get the deb package to install it in #Arch?