Here is a quote from aguda, as quoted by Lakewood alerts:
we feel it is important, midarchei ha’shtadlonus, that there be a large turnout at this event. Accordingly, and in consultation with our rabbinic leadership, we are circulating to our friends and constituents information about the rally. More information will be available here in the coming days.
I would not call this “pareve”. It may be cautious maybe because it is organized by a different organization and maybe disagreements within aguda, but it is an endorsement. They are careful not to call directly to attend, possibly not to put in awkward position those who don’t want to.
So, if you are looking for their guidance, it is there. But if you want to be meikel and follow your own daas, you can do that also.