P: Should allow exporting raw files with settings/changes

On IOS 13 you can export to DNG and it will include the XMP metadata like Classic does.  The present version has a bug where the Ratings (stars) are not in the metadata.  Maybe it will get fixed.

I too wish they would update the Export as Original to write a REAL XMP file beside the RAW.

I am looking to move away from laptop / desktop entirely for my workflow, I would love to be able to export Raw / Sidecar files on my iPad Pro and push them to my NAS.

I am a subscriber and I use both iPadOS version and macOS version, and I always save RAW files and sidecar settings files for backup. Sometimes I import RAW files directly into my iPad Pro and edit them, and I just don't see the point of waiting it to sync hundreds of 80MB RAW files and re-download all of them on my Mac (which could take hours) while adding this feature on iPadOS can make my backup workflow done within seconds. So either letting iPadOS users to export RAW files with sidecar settings or desktop users to export settings only would be great.

And also- why only JPG, so compressed.
TIFF would be a better option.
Regarding the ‘mobile’ a lot of people actually using it on the iPad Pro, so it would be reasonable to have a TIFF and more option from Lightroom Classic.

Following this forum does make it look like there's a million bugs, but from experience, I don't think there's any more than the LR4-6 cycles. There's just a lot more potential to go wrong and a lot more legacy code than there was in the early days. That said, it's much easier to roll back or forwards these days, so although there's no excuse for bugs, there's nothing to stop you settling on a release that's working well for you even with the subscription.

Perhaps the uploading would be easier but I'm not willing to subject myself to the continuing barrage of bugs with each new CC update. Grrrrr
Adobe have really lost my confidence in them.

In Lightroom Mobile when you "Export Original" it only exports the RAW file and changes the name from the original.  It should keep the same name and also export an XMP file with the edits and metadata like Lightroom Classic does. It can't be that hard to implement.

Mobile-related questions (other than how to sync Classic) are in the Edit Like a Pro book because it's part of the Lightroom cloud ecosystem rather than Lightroom Classic.

Essentially you'd need to export the photos from Classic, get them onto your iPad/phone (for example, by uploading them to Dropbox or putting them on a memory card) and then import into Lightroom mobile on the devices. Way way way easier with a subscription though.

How do I do that? Are the instructions in your book "Missing FAQ?"