
Hello T. The new Microsoft Edge Collections have diminished a key feature that made it a viable option for serious researchers internal search capability. Previously users could search their collection and find if their specific notes, links, and pages resided in their collected items. With the new Collections, users are left with Bing search that is web-based instead of part of their own content. And it has been disappointing for users to find that most of Collections is web-based and the internal search that seems very reasonable to expect is missing. Many users see that the old Collections was more of a way to organize research than a shopping, or discovery experience.
Sadly, there is no internal search function and currently, no known workaround to search content within your saved collections. You can create a new collection, open all links saved in the collection, and rename cards, but the current version doesn't allow for text-based searching of saved collection items.
Best regards,