Warning
Closing thanks to Blender getting better by the minute:
#154987 - Anim: add loop modes to the playback popover - blender - Blender Projects
Provides extra Playback looping methods to Blender via a drop-down menu in the timeline header.
Adds a menu in the Timeline header (and other animation editors) to change the Playback's Loop Method:
- Loop: Standard looping playback (default);

- Play Once & Stop: Play once and stop at the End Frame;

- Play Once & Restore: Play once and jump back to the frame you started the playback from;

- Play Once & Jump Start: Play once and jump back to the Start Frame;

- Ping-Pong: Loop back and forth between the Start and end Frames.

In the addon preferences, chose whether to show only the current loop method's Icon in the header (default), or also show its label (takes more header space):
You can download the extension either from:
The installation process is well explained by Blender's official extensions platform documentation:




