Searching Table of Contents – Elementor Widget

Is it possible for Ivory Search to search what appears on a table of contents(TOC)?

I have posts that automatically generate a TOC based on the headings used on the post content. Instead of searching the entire post content I want to search a subset of the post content, just the TOC.

For example, let’s say I have 10 posts and each post has a TOC. Only 2 posts have the word XYZ on their TOC, but the word XYZ appears on all 10 posts through the entire post content (TOC and body text). When I search for XYZ , I only want to see the 2 posts that have XYZ on its TOC.

I am using the Elementor Pro widget and I do not know how to go about this. Please advise.