Is your feature request related to a problem? Please describe.
Tooltips generated from a glossary should show up only on the first occurrence on a page.

Describe the solution you'd like
Volto provides a context of the View component for the case that blocks need to know about each other.

Wrap the RenderedView component with a context provider.

Describe alternatives you've considered
Hints where to hook in the collection of blocks without a change in packages/volto/src/components/theme/View/View.jsx are welcome. As an alternative to the wrapper with context provider, I see only the shadowing of the View component, which is obviously no option in an add-on.

Additional context
rohberg/volto-slate-glossary#8
Per default, glossary terms are searched per slate leaf. Which leads to a tooltip on every match.