That can be quite time consuming, and confusing. Could you consider a future practice to have more detail in the release notes, or to have a different summary that has more detail? It’s not easy to understand what all is affected by a given commit message without spending quite a lot of time in there.
There are no plans for more detailed release notes. If you rely on understanding the changes, you probably should run the old and the new LT release over a large text corpus and make a diff of the results.