Pretty standard for healthcare, honestly - the algorithm basically yawns at you until you've got your whole feed looking immaculate and the bids aren't scared to actually compete.
A few things that helped me get unstuck: first, your bids might be too timid even on Max Clicks, so you're not even entering the auction. Second, check your feed is visually and technically tight - titles, GTINs, relevance all need to scream this is the right product at the platform.
also, double-check targeting isn't suffocating itself. And in prescription/spaces with compliance filters, the reach can get chopped down fast without you noticing.
Try nudging bids up or switching to manual CPC for a bit just to wake the campaign up and get those first impressions rolling.