Is there a way to reuse a section, group, or similar? A master?

I am thinking if I for instance create a top/bottom menu bar, that I use on say 10 mobile views, and I decide to change say the master and have all change similarly, is that possible with figma?

If so how?

I saw something on youtube creating a master, but the other ones did not seem to be locked to that but he was able to change them independently. I want them locked to one.