For sure - there's a somewhat-active IxDA Slack channel for systems thinking and a few of us are posting there regularly but due to the nature of the systems thinking topics being relatively advanced and inaccessible, it's hard to get a meaningful conversation going without an existing community of practitioners who are already roughly aware of the fundamentals.
That being said, there is a "core group" of sorts in this channel and people are friendly. A few of us are attending ST courses and learning more so eventually more conversations will take place.
Feel free to join us in the #systems-thinking channel here and ping me for an invite to the IxDA Slack space if you haven't got one already: