Chained creational OOP design pattern problem

I am creating a class that is responsible for validating a configuration. This class calls other classes that validate said config by creating new instances in the form of a chain. At first glance, the code structure looks horrible, but It works. Anyway, I think it's not the best way to handle this logic.

I leave here a simplified version of the code in TypeScript, but I also leave it in Python and Java for reference only:

class Validator {
    private _notValidatedConfig: NotValidatedConfig

    constructor(notValidatedConfig: NotValidatedConfig) {
        this._notValidatedConfig = notValidatedConfig
    }

    validateConfig(): ValidatedConfig {
        return (
            new Phase4Validation(
                new Phase3Validation(
                    new Phase2Validation(
                        new Phase1Validation(
                            this._notValidatedConfig
                        ).validate()
                    ).validate()
                ).validate()
            ).validate()
        )
    }

    // Alternative
    validateConfig2(): ValidatedConfig {
        const validatedPhase1Config: ValidatedPhase1Config = new Phase1Validation(this._notValidatedConfig).validate()
        const validatedPhase2Config: ValidatedPhase2Config = new Phase2Validation(validatedPhase1Config).validate()
        const validatedPhase3Config: ValidatedPhase3Config = new Phase3Validation(validatedPhase2Config).validate()
        const validatedPhase4Config: ValidatedPhase4Config = new Phase4Validation(validatedPhase3Config).validate()
        return validatedPhase4Config;
    }
}

• Python
• Java Disclaimer: I don't have any experience with Java, so maybe there are some syntax errors.

The "alternative" is the same code, but not directly chained, instead, for every validation, it's creating a new variable. I think the "alternative" is more readable but performs worse.

What do you think about this code? what did you change? How would you face this problem or with what design pattern or framework? (programming language doesn't matter for these question)