To bypass the inability of Sleep as Android (caused by the inability to disable Samsung sleep tracking on its smart watches) to override Samsung sleep tracking, there should be an option in SAA to say,
“If SAA recorded sleep at the same time as Samsung Health, delete the Samsung record, and keep the SAA sleep record. If SAA did not record sleep or otherwise was not used for sleep tracking, keep the Samsung record”.
Also for extra points, “before deleting the Samsung sleep record, extract the Oxygen sensor levels that were read by Samsung Health, and transpose them o to the SAA sleep record”. This may be an acceptable work around to the inability of SAA to read the proprietary sp02 sensors used by Samsung.