Thank you.  Turns out the issue is that while the missing profiles had subscribed to the newsletter, Klaviyo no longer recognizes them as subscribed.  Pondering a work around to get them to resubscribe.

​@Squamishpoacher, Glad you found the root cause! One potential workaround is to create a segment of these ‘unsubscribed’ profiles and send them a re-engagement campaign via another channel, such as SMS or a targeted social media ad. If they’re still engaged with your brand, they may opt back in. Also, if you have a record of their original opt-in (e.g., from Shopify or another platform), you could reach out to Klaviyo support to see if they can assist in restoring their status. Let me know if you’d like help setting this up!"

What is the reason why they are no longer recognised as subscribed? As in they are suppressed or unengaged?