Getting the fields from previous steps

Hello.
Since ‘on_sent_ok’ is deprecatd, I use the DOM events to submit the fields from my forms.
I submit the form in step 3 but I need to get the fields in step 1 and step 2.
Using
var inputs = event.detail.inputs;
only gets the fields in step 3 but it doesn’t for fields in step 1 and 2, so, how can I get them?

Thanks in advance

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