Two identical menus on the site. Does SEO hurt?

Question

Search Engine Optimization

I have a main product menu for BB on my site, I copied it for the mobile version. I hid the mobile menu under the display: none media query, it's just that the main menu is too large and it's hard to make it adaptive for mobile with styles. They write to me that it’s impossible to do this in relation to SEO, you need to add a second menu through jquery. Please tell me, is it possible to do this at all?

Answer 1

Answered a very similar question, nothing has changed since then.
TL;DR
The impact on SEO, if any, is very small. In most cases, it's not worth it.

Answer 2

They write to me that it is impossible to do this in relation to SEO, you need to add a second menu through jquery.

- they write you correctly. display: none just hides the menu from the eyes of visitors - but in the code it remains and is indexed! In fact, you will most likely have overspam, but since there is overspam in the a tag zone, you are unlikely to get sanctions. But it’s also harder to get positions - since your menu dilutes relevance. Duplicate as if possible (because they are not punished for this) - but it’s better not to)

Answer 3

display: none is not the best way to hide the menu. In general, the hide method in js is more correct.
On the other hand, if you have the correct micro-markup and the search engine easily determines the main content from the additional content, then there will be no problem.