spell slots when multiclassing - The Best Multiclass Options For Sorcerers In Baldur's Gate 3 rich 888 slot

I'm multiclassing into Paladin/Warlock/Sorc, and I'm wondering: can Divine Smite only be used in spell slots gained specifically by taking a level in Paladin, or can all available spell slots be used?

You expend a number of spell points to create a spell slot of a given level, and then use that slot to cast a spell. You can't reduce your spell points total to less than 0, and you regain all spent spell points when you finish a long rest.

Spell Slots. The Eldritch Knight Spellcasting table shows how many spell slots you have to cast your level 1+ spells. You regain all expended slots when you finish a Long Rest.