[Vuejs]-How to prompt second tab content while selecting 2nd option in dropdown

You can use refs and can use the changeTab method of form-wizard to change the tab.

<select @change="go" id="select-option">
    <option value="" disabled selected hidden>Select...</option>
    <option value="1">Template 2nd</option>
    <option value="2">Template 3rd</option>
</select>

go() {
    let index = document.getElementById("select-option").value
    this.$refs.formWiz.changeTab(0, index)
}