Do I need a sitemap for a landing page?

Question

Search Engine Optimization

Do I need a sitemap for a landing page, just html, css, js, without an engine and links?

Answer 1

It is not required for some sites, and even for a landing page, there is no point in using it.
ps It's better to add it to the webmasters panel - so you will at least notify the PS about the existence of your site (if you need it).