Does Yasuo Remorseful deal damage twice - once from his attacker trigger and once from regular combat damage?

Ruling: Yes, Yasuo Remorseful deals damage twice - first from his attacker trigger effect, then from regular combat damage.

Sequence:

• You attack into battlefield
• Yasuo's attacker trigger goes on the chain and you declare a target unit at the battlefield
• Both players pass priority
• Yasuo deals his might to that target unit
• Both players pass priority
• Cleanup occurs and Yasuo deals might and takes damage in the combat damage step

Nuances:

• The damage from Yasuo's attacker trigger lingers (it is not healed immediately)
• Damage is only healed at end of turn or at end of combat
• This means you can deal damage with the attacker trigger to a unit and then hit it again during the combat damage step