Hi there,
I am sorry for the inconvenience caused.
Actually, the icons on the stream action are removed from Echo template in the latest version to accommodate EasySocial reaction feature. The reason is because to standardize the display of the stream.
Regarding your RSS icons, it seems like it is missing from EasySocial. I believe it is a bug and I have logged this issue to our developers. This issue will be fixed in the next EasySocial release.
Thanks and have a wonderful day ahead.