In general < iframe > method is not recommended becuase of security reasons. There are other methods - check on forum.joomla.org or research on google/bing for phrase "iframe alternative".
2nd - sorry, not fully understand your concept. In SPPB you can find & use:
Maybe one of them can help, check their features. If not, you may need a custom solution. It may be worth it - if you have the funds for this project.
Or maybe you need additional component, like My Maps location (JoomUnited) or different one.
Becuase Page Builder is mostly for "static" separate pages, hence my suggestion.
This topic goes beyond JoomShaper support. I helped as I could.