Facebook pages, no matter how may hundreds of thousands of likes/follows it gets, can still be dead. You really need to focus a lot more on it to get something out of it. For example if you have an artist page, and a personal profile, you should have 99% of your total Facebook activity on the fanpage.
I would suggest post almost exclusive content on there to attract more traffic. And interactive content - not links leading to other platforms. Facebook loves native content. So that video you posted on Instagram, upload another version of it on your Facebook page.
Push for shares. Shares are what really makes pages blow up. Not likes and comments as much.
Keep in mind Facebook does have an older audience now, the older generation dominates Facebook. But in developing economies, it's still thriving with the younger generation.