Three things determine whether your agency appears in the Google Maps 3-pack for Vancouver insurance searches: relevance (does your GBP and website match the search?), proximity (how close is your office to the searcher?), and prominence (do you have reviews, consistent citations, and an active web presence?). Of those, relevance and prominence are the most actionable for local SEO.
For relevance: make sure your GBP service descriptions use the exact phrases Clark County residents search for, your service categories match your coverage types, and your service area covers the Vancouver neighborhoods you actually serve. For prominence: build a consistent review generation system targeting 5-8 new Google reviews per month, ensure your agency name/address/phone is consistent across all directories, and publish regular GBP posts. According to Google's own local ranking documentation, prominence is also influenced by links, articles, and directory listings across the web - making citation building part of any complete insurance local SEO strategy for Vancouver.