Investigating my own question:
I got the behavior above (no Rewind function available) in PPSSPP 1.10.3 installed on a chromebook from the Google Play Store - i.e., the Android version although running on a Chromebook.
Today I found that I also see no Rewind function in the menus on an Android phone.
I tried building the Linux version of PPSSP 1.10.3 on the Chromebook - then Rewind is available.
So that makes it appear to be an Android-specific behavior, not a Chromebook-specific behavior. However, it surprises me that Rewind would be left out of the Android version of PPSSP... but that I could not find any comments online about it.
I got the behavior above (no Rewind function available) in PPSSPP 1.10.3 installed on a chromebook from the Google Play Store - i.e., the Android version although running on a Chromebook.
Today I found that I also see no Rewind function in the menus on an Android phone.
I tried building the Linux version of PPSSP 1.10.3 on the Chromebook - then Rewind is available.
So that makes it appear to be an Android-specific behavior, not a Chromebook-specific behavior. However, it surprises me that Rewind would be left out of the Android version of PPSSP... but that I could not find any comments online about it.