Can Turn to Dust give temporary to a Trinity Force attached to a Kaisa survivor?

Yes, you can use Turn to Dust to give the Temporary keyword to a Trinity Force that is attached to a Kai'Sa, Survivor.

According to the rules clarifications provided for Turn to Dust:

• Attached Equipment only have their printed rules text made inactive (per Rule 135.4 and 718.2), but any granted rules text remains active.
• When Turn to Dust grants the Temporary keyword to an attached equipment like Trinity Force, that granted effect is fully active.
• Consequently, the Temporary keyword will trigger and kill the attached Trinity Force in its controller’s next Beginning Phase.

This is consistent with Rules FAQ Clarification 2026-04-29, which explicitly addresses this interaction, confirming that granted keywords remain functional even while the card's base text is suppressed by being attached.