MarsSeed [1] filed a deletion request for matrix-appservice-telegram [2]: Unused as per pkgstats / popularity.
A more properly named package for the same has been added to AUR in Nov 2020: - mautrix-telegram [a] This was also mentioned in comment in Dec 2020 by @BubuIIC. [a]: https://aur.archlinux.org/pkgbase/mautrix-telegram [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/matrix-appservice-telegram/
