SHM 221 (phone), here is what I have observed:
* A complete remake of the styles and theming (why didn't they make a dark mode already, they are adding night values and assets yet still using a light theme, come on Samsung, just add the night mode... now I have to re-patch everything they did to make the themes work again) ...
* Argentina [AR] has documentation on privacy and policy and terms of use of SHM (I don't see documents on BP or ECG)...
* A lot of updates have been done on the PDF for different countries (few on privacy policy and a lot on ECG), and my guess is syntax and grammar...
* Once again, more visual changes (buttons, images, animation, and so)...
* I see they introduced a lot of new dimensions for large screens up to 1920dp (does that mean they want to support tablets...? maybe an update is coming for Galaxy Wearable that would work on Tablets

)...
* They got rid of the side-navigation drawer and moved everything to a new settings layout view...
* They added time, as in edit time. Not sure what exactly the time is for...
* method isFranceRegion added (Mayotte [YT] and Réunion [RE])...
* I mentioned earlier about Argentina [AR]. It's being checked by CSCUtils (so maybe ECG and BP or one of them is working now)...
* Most of the code files seem to be the same but they have a lot of annotations (this is just a quick randomly selected files, I didn't see them all)
* Encryption logic changed, might work on devices that had encryption issues now...?
* big portions of code missing where I used to usually apply patches. This is a setback, there will be a delay as I now need to go through things step by step, with trial and error...
All I can say is it's another major update, Some of the patches I apply are no longer applicable due to the code being erased, moved or rewritten, so the theme will temporarily go back to the light mode, and there is no ETA on when I can release the patch as light theme mode, I have to go through a lot of testing...
I am bracing myself for a bumpy hell ride...
EDIT: Someone told me Samsung finally added dark mode to the app, this will make hell ride less bumpy lol...