It’s hard to tell if your posts are getting enough likes. You can’t always tell from the number of likes alone. But you can tell from the engagement your content is getting. The more engagement, the more likely it is that you’re posting content that people want to see.
The most important thing to remember when you’re trying to get more likes on your posts is that people will only like what they want. If you want them to like something, make sure it’s something they’ll find interesting and relevant.