[wbamp-show start] shortcodes with Beaver Builder can be used with modules Text Editor or HTML block.
Within Text Editor I can put an image between [wbamp-show start]...[wbamp-show end] it works fine, the image shows only on Amp pages. And in the Beaver Builder Edit Mode, I can see and open the Text Editor and make changes.
Now if I want a Gallery, only on AMP, I need a Gallery Module, between two HTML Modules containing [wbamp-show start] and
[wbamp-show end] respectively. When creating a block like that Beaver shows the shortcodes and I can edit. But if I come back after publishing only the HTML Module containing [wbamp-show start] is visible, the gallery and the ending shortcode are gone.
A solution to see and edit this AMP content is to change temporary the opening HTML to [wbamp-show start][wbamp-show end]
But that means: enter edit, change the HTML, save or publish, enter edit, edit, delete the temporary [wbamp-show end], and save/publish. And a common user may think the amp content is gone, and not think about a trick like this.
Maybe you can change your shortcode so that Amp is hidden on desktop, except when editing (with Beaver Builder in this case)