warlock spell slots short rest
Spell Slots in D&D 5e: All You Need to Know!
All spellcasters regain spell slots during a long rest - except the DnD Warlock, who can also do so during short rests. Other classes get some long rest buffs too, though.
Warlock Spells | Dungeons and Dragons Wiki | Fandom
To balance this, instead of several differently-leveled spell slots, warlock spell slots are always upcast to the highest level possible for that warlock level.
5e spells regained from short rest? : r/dndnext
Similar to a Druid, a Wizard can use a feature called Arcane Recovery to replenish spell slots after a short rest.