Dungeons & Dragons: Multiclass Spell Slots, Explained
Can a multiclass sorcerer make spell slots for their other class using sorcery points? For example: can a multiclassed sorcerer 3 / warlock 1 use Flexible Casting to create a warlock spell slot?
All changes to the Warlock in the 2024 Player’s Handbook
The Warlock table shows how many spell slots you have. The table also shows what the level of those slots is; all of your spell slots are the same level.
5e: How Do Spell Slots Work? — Make a Skill Check
For instance, a fifth-level wizard would have nine spell slots, while a fifth-level Warlock has only two.