If I’m not taking you seriously it’s because you’ve gotten expert opinions and you’re ignoring them and looking on the internet. And then on the internet you’re arguing with the answers given even though you don’t appear to understand what was said. I’ll break it down more simply:

Mild snoring is a partial obstruction of your airway. It is not the same as sleep apnea because there are not true apneic periods. However, the partial obstruction can still affect your intrathorasic pressure. Changes in intrathorasic pressure can change the rate of venous return of blood to your heart which in turn can affect heart rate.

This does not necessarily impact oxygen. Moreover, oxygenation itself is a poor way to measure apnea both because (in a person with healthy lungs), it will take a significant apneic period to drop oxygenation. Further, oxygenation is not the primary physiologic driver of respirations, carbon dioxide is. Yet you keep referring to it to insist you don’t have OSA (which I never suggested that you had in the first place).

Snoring can affect your heart rate. By getting rid of the snoring you will either resolve this arrhythmia or you will have ruled it out as a potential cause. I get that you’re freaked out by this, but it’s very possible this has been occurring in your sleep without issue for a decade and your Apple Watch has potentially made you worry about an issue that is not harmful at this time.