Updating multiple pages at once

We have a series of 20 similar landing pages which we use for our PPC ad campaigns. Currently when we update something we have to individually update each one.

Does anybody know of a way to simplify this and centralize those kind of edits?

We’ve tried using widgets on pages but ran into problems because you can’t build or edit things in a widget nearly as easily as you can using the Advanced Layout Builder.

The perfect solution would be something like a plugin that allows you to add layout elements in the Advanced Layout Builder, edit something in one and those changes are reflected across many pages. I couldn’t find anything like that so perhaps I’m thinking about this in the wrong way?

Thanks in advance for any help, ideas or suggestions you can offer!