Hey. I just saw a youtube video about what's new in SF Symbols 4 which was released 3 months ago. There were 722 new symbols in the video as you can see here:
In my SF Symbols 4, which I just downloaded, there are 890 new symbols:
So it seems as if there was a new version of Sf Symbols 4 in the time from the Youtube video until now and therefore I wonder how often a new version appears because so far I have not been able to see any release history of the versions. Best wishes