@mjhoefer:Here is one option, but it only works if your goal is to export, which is not the case in my request. But I will share it anyways. If you have the notes all in order in the Explorer pane, shift select the entire range of them and drag them into an empty note. It can be easier to pin the empty note first so that when you select the range, it doesn’t open the first note you click.
The resulting list of links can be changed into a list of embedded notes by adding an ! before the [[. A quick way to do this is doing a Find and Replace within the note, finding all occurrences of [[ and replacing them with ![[. If you like using plugins, I believe there is a plugin that does this automatically if you hold alt while dragging links from the Explorer pane in the previous step, but that’s besides the point.
At this point, if you are in either preview or live preview mode you will see all your text. There is a css snippet to disable scrollbars for embeds thus showing the entire text. Regardless, when you Export to pdf you will get the entire text. You might want to give it a try, selecting and copying text from preview mode and see if it can be successfully pasted into a new note. However, last time I checked or heard, that process has some issues. So you could copy and paste from your pdf and experiment with whether you prefer normal pasting or paste unformatted text. From there, I guess you might have to do some cleanup.
People may recommend a pandoc workflow, but I can’t help you with that. It sure would be nice to be able to do this in Obsidian and retain all the formatting. Perhaps someone will see this and recommend some plugin I am unaware of. Thanks for your interest!