score:0

you can update button's type as your form steps change :)

            <btn
                class={ step === titles.length ? "btn-green": "btn-green"}
                text={step === titles.length ? "next": "next"}            
                onclick={() => {
                        setstep((currstep) => currstep + 1);

                }}
                display={step < titles.length ? "block": "block"}
                type={step === 5 ? 'submit' : 'button'} // <------
            />

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