warlock level 5 spell slots | warlock level 5 spell slots

A level 1 spell fits into a level 1 spell slot, but a level 2 spell is too large for a level 1 slot – you can’t use lower-level spell slots to cast higher level spells.

Warlock spell slots Recharge: short rest (spell levels 1-5) Expended by warlocks to cast any spells they know. Warlock spell slots are all the same level, and any spells casted by expending them are upcast accordingly.

Warlock Spell Slots don't level up any higher when multiclassing, so if you want stronger Spell Slots you'll need to keep taking levels in Warlock.