Welcome to Microsoft Q&A! Thanks for posting good question.
If I have understood you correctly, you’re expected content doesn’t appear or is missing while operational. Typically, missing content could be the result of documents getting dropped during indexing.
- Free and Basic tiers have low limits on document size. Any file exceeding the limit is dropped during indexing.
Kindly examine for dropped documents in the Azure Portal> In the search service dashboard> double-click the Indexers tile. Review the ratio of successful documents indexed. If it is not 100%, you can click the ratio to get more detail.
If the problem is related to file size, you might see an error like this:
"The blob <file-name>" has the size of <file-size> bytes, which exceeds the maximum size for document extraction for your current service tier."