I ended up just adding the block to blog 1 and then apply_filters( 'the_content', $ad->posts->post_content ); worked perfectly. So I guess this is more of a bugfix. will report. thanks.
edit: actually, this did not work. I just noticed that during debugging I added switch_to_blog( 2 ); to acf_register_store() which was why it was working. So I guess I’m still not sure how to proceed, any help would be appreciated. thanks!
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