This is the problem with social media platforms, people like to stay in the FB circle not going to external links. In other social platforms there will be more engaging audience who clicking on external links, but FB better you build your own group, invite most of your 500k subscribers to your group, there you can do direct offer your products por services or email list (free course) , so that you get the most of these subscribers moving to your own list= your own land/ real estate! These social platforms is rent land, not your own !Many people like your post but don’t click the link. Try putting the link in the post, not the comments. A catchy caption or short video may help. Also, tell people why they should visit your website.
There are also many ways to combine work. Being able to use tiktok is also a good thing.Make sure to refine your URLs to be memorable, appealing, and easy to access when shared on Facebook, incorporating attractive and meaningful headings. Utilize Facebook ads to channel visitors from your Facebook page to your site.