Not a great picture to help in any way........

No way to tell how much space you have other than it is two story.

No idea what the flavor or style in the rest of your home will be.

There are a billion lights from which to select

The one thing I can say is that if you're talking about the center fixture in the foyer there is no way you want to replace that with a pot light. You need a chandelier that hangs down so it throws light across a wide area, lighting the stairs. If you can post a better picture that shows your current fixture in the space someone will let you know if the scale of the fixture is right. If it is, you measure it and then start looking for replacements that are roughly the same size, but an updated style. In order to get more specific suggestions we need to know what your style is: traditional, transitional, FL modern? Can you show us a furnished room such as the living room?

We need to see the space so another ppic posted here in a comment showing exactly where the fixture is in relation to the space .

Chandelier for sure, but suggest waiting to choose until flooring/staircase are done/accessories are being considered, as you’ll want everything to be complementary. To help with the size, article below may be helpful and a good lighting store will also provide good info (bring a photo with you). https://www.thespruce.com/the-right-height-for-a-foyer-chandelier-1976289?utm_source=pinterest&utm_medium=social&utm_campaign=shareurlbuttons
Below is an example of a style connection and how an overall space can benefit.

So here are a number of more interesting chandeliers that might work in your foyer. Be Creative.

stand over on the other side and take a picture of the actual light.

This is the existing chandelier.

I will put a 4' wood chest next to the steps. In the recessed 40" wide area, I am looking at arched-top cabinetS. We want a casual and current look.

A foyer is an announcement.....a space suggesting what is yet to come.

Go to the front door. Open it! Take a picture or two! Draw and measure the whole foyer...feet, inches, doors and which way they swing.

Now................look in. What does the REST of what is beyond this foyer look like? What do you want it feel like, look like. It's open to what space? Great room? Dining? Living room ??

You're asking for an answer minus any context whatsoever.

Post inspo pics for HOW you want your home to feel. Along with that drawing above, for which you need a tape measure, paper and pencil. you don't need a computer program : ) just neat and legible in a jpeg format