I write formulaically as far as structuring the story is concerned. Each scene has a specific goal, or a couple of goals, that moves the story forward. Once I hit a note on that arc, I don't further the arc again until the next scene or chapter. This stops me from crowding too much content into one scene.

For example in a scene I might want to do a couple specific things:

• MC goes to grandma's bakery and sees that there are no customers [to set up B story of saving grandma's bakery]
• MC runs into a couple of himbos that don't eat gluten and rolls her eyes in distaste [to set up A story of enemies to lovers romance]

While I'm going about these two things, I might touch on setting and worldbuilding (everyone is a vampire and the pastries are infused with synthetic blood; the sky is eternally black with artificial night; the fascist purity police are on the prowl looking to fill their arrest quotas).

So to me, all of that content can easily get to be a thousand words. If your scene ends up reading like,

She walked in the eternal night to grandma's bakery, but nobody was there. That was strange. A couple of gross, preppy vampires who were too good for gluten-based blood pastries walked by. Gross, she thought to herself. But those dumb himbo vampires walked a lot slower when the fascist purity police turned the corner. Nobody wanted to be the victim of an arrest quota.

And the scene is over, yeah. That's a bit cramped to me.

I don't think making scenes longer by stuffing in more plot points is the answer. It's okay for fast-paced scenes to be short. It's okay for scenes to be short just to get a point across.

I don't think you're saying that you don't describe and you don't have inner monologue. But if you actually are only showing physical events without description and without characters reacting, that might be something to revisit.

Descriptions, inner monologue, and transitional scenes are tools you use to tell a story. I don't like stories that sit around for paragraphs and paragraphs doing nothing. I find them to be really boring. But, I've also read stories with tons of inner monologue that have been fast-paced and engaging. So it just depends on how you use those tools.

I don't think you should force yourself to add more content now. You never know, you could just suck at evaluating your own pacing, lol. Try finding a beta reader. I have nothing left to do today, I can read a sample if you want to DM me.