Heyo, Ghost.
You are one of my favorite artists here on FA, so I'd like to give you some insights from one artist to another.
I think there are too many variables that affect the activity on your page. A lot of them, you cannot control. Things like time of the year, current events, economy, all influence on how much people log onto FA and interact with posts. Some times it's a matter of pure luck if your art is found in the Browse page.
There are other things that I've seen you CAN do to improve your engagement. Posting constantly with a very recognizable style and a specific audience in mind help quite a lot to get more views, likes and such. There is no specific number; you can post daily or once a week, it all depends on what suits you.
Also, there are many ways you can innovate your posts. Not only drawing different things each time, but you can try different approaches, using different social media, trying dynamics where you ask your viewers to interact or collaborating with fellow artist, all help keep your page alive.

But the important thing is that you remember why you draw and have that in mind when thinking about your posts. It's no good that you worry about a simple number like viewers, favs, or comments. There is much more than that to art. As long as you draw to express something true to you, there will be someone to appreciate your art.

Awww, GOSH, thank you so much for your extended answer, I really needed it!!! 😭😭😭❤️❤️❤️
To my mind yeah, THERE IS uncontrollable activity. Once my friend and I made a table of views in excel, to make sure when it more convenient to post art ahahaha
About constancy of ourself fellow artists it's true! But... I think I need to relax after uni before I go back to constant drawing.... Didn't think about it :_D
And interaction with other artists and with followers is a good hint! Again, thank you so much❤️❤️❤️

No problem! Finishing uni is a good moment to think what kind of direction you want for your art. And it's not that it's in a bad direction right now! Just consider how much time you want to dedicate to art. Whatever you choose will be okay!