So you might want to try this:

ThirdPartyEmailPassword.init({
  signInAndUpFeature: {
    style: {
      headerTitle: { display: "none" }
    },
    ...
  },
  override: {
    components: {
      ThirdPartyEmailPasswordHeader: (OriginalComponent) => (originalProps) => {
        return (
          <div>
            <h1>text1</h1>
            <img src="https://s.ai/logo_full.svg" />
            <OriginalComponent {...originalProps} />
          </div>
        );
      }
    }
  }
}

- You need to override

ThirdPartyEmailPasswordHeader

component (which will affect the sign in and sign up pages. - You need to hide the current title by using

headerTitle: { display: "none" }

as seen above.