/etc/xdg/autostart/orca-autostart.desktop is in gnome-orca 3.22.2-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 | [Desktop Entry]
Type=Application
Name=Orca screen reader
Exec=orca
NoDisplay=true
AutostartCondition=GSettings org.gnome.desktop.a11y.applications screen-reader-enabled
X-GNOME-AutoRestart=true
#X-GNOME-Autostart-Phase=Initialization
OnlyShowIn=GNOME;MATE;Unity;Cinnamon;
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