Playback speed adjustments are only available in the Camera Events section.
The Livestream section displays real-time video, so it's not possible to adjust the playback speed while watching. Similarly, the Memory card section shows live-access footage being read directly from the camera’s memory card. Because this is also streamed in real time, playback speed adjustments are not available here either.
However, if you want to control the playback speed, you can save the recording afterwards and review it from Camera Events:
Go to the Memory card section and save the desired recording.
Go to the Camera Events section, sort by "Saved" status and play the recording from Camera Events.
Here, you can watch the video at different playback speeds, such as faster or slower, depending on your preference.