Can a class method be accessed both in an instance and statically?

I am relatively new to class design and I have a task that I’m not sure how best to complete, or whether my idea in general is a code smell.

Is static going to make any difference in this code snippet

I have been to an interview and was asked this question – is there any difference adding or removing the static keyword in these classes?

Static properties and implicit “self” property in structures and enumerations vs classes in Swift

I am currently reading the Swift language documentation and came across these sentences in the chapter about methods:

Static properties and implicit “self” property in structures and enumerations vs classes in Swift

I am currently reading the Swift language documentation and came across these sentences in the chapter about methods:

Static properties and implicit “self” property in structures and enumerations vs classes in Swift

I am currently reading the Swift language documentation and came across these sentences in the chapter about methods:

Mock part of a static method

I am designing a test for an existing static method:

Android + Kotlin + Hilt: Dependency Injection vs Static Methods

I’ve already read this carefully, but still need more clarification.