I'm having a horrible time getting impressions in some countries myself. I would say it's because the demographics are small but I normally see more impressions than this for the exact same amount of people - not sure what's up.
I'm assuming overall traffic on FB is down, so it's gonna require higher bids to get impressions at what were the "normal" levels. I'm seeing the same though, much lower than a couple weeks ago. It'll come back
Try changing up creatives too if you haven't already. I'm finding that if your ads don't get clicked after 3-5 days, it becomes much harder to get impressions for them.