What type of architecture would be Spring Boot + Flutter

I have a mental doubt for quite some time, I am looking for diagrams my applications, but I find myself in a dilemma about Spring Boot, for example, I usually work like this with Spring boot.

Spring boot image structure

And with flutter like this.

Flutterimage structure

My doubt is what kind of architecture am I applying? I am too confused if it is a service oriented (SOA) , client - server or N - Layers.

I thought it was SOA, because in my projects I usually have a controller for certain entities, example. ClientControler. InvoiceControler. ProductControler. And each one is a service, customer service, invoice service and product service, and my app the consumer of the services.