This:
![[Linked Image]](https://i.imgur.com/KL5rVS2.jpg)
And to answer OP question: Sneak Attack is now done as separate damage instance, which btw opens up the way for lots of exploits. So when you see 1d6+3+1d6 on current Sneak Attack button, it deals 1d6+3, and then it deals another 1d6. If something modifies the damage, both damage instances are modified like they are a completely separate attacks. For example, if you have Great Weapon Master enabled, both attacks get +10. See here:
![[Linked Image]](https://i.imgur.com/gBaKKjb.jpg)