I need help for SEO setup

Hello!

Those are called Sitelinks, and Google automatically creates those for popular websites, and they change depending on the search query. You cannot insert these yourself.
To learn more, see https://developers.google.com/search/docs/appearance/sitelinks.

If you advertise on Google, you can insert these manually beneath your ad — as with all Google Ads, these cost money: https://support.google.com/google-ads/answer/2375416.

Thanks for the information