Yes. You can use the KM Execute a JavaScript in Front Browser action.
This JavaScript will return all rendered text currently showing on the page:
document.body.innerText;
You could then search that text as you like.
However, you might also be able to search/compare the exact field/text of interest, using a querySelector() statement. If you'd like help with that, please post the page URL (or HTML code in a Code Block) and screenshot of the target region with the target data clearly identified.