The Abacus | Talesmith Tavern
Right from the get-go Warlocks regain all spell slots after either a long or short rest (at least 1 hour). No requirements, just slot recovery galore!
Short Rests and Long Rests Explained in Baldur's Gate 3 - Getting ...
Overall, adding a few levels of Warlock to your Paladin will give you a devastating ranged spell, two spell slots that refresh on short rest, and the ability to use your Charisma modifier on weapon attacks.
Things You Didn’t Know About D&D 5e: Preparing Spells – Dungeon ...
You regain all expended spell slots when you finish a short or long rest.
Resources - bg3.wiki
You can also fill up your Spell Slots via short rest, so after every fight make sure to short rest to keep this build having the spell slot fuel it needs.