Baldur's Gate 3: Best Wizard Class Build - Game Rant
A Long Rest will also restore Spell Slots and Actions. Some Actions and specifically a Warlock's spell slots, however, only require a Short Rest.
Baldur's Gate III | BEST Warlock Spells (All Levels) - YouTube
Create Sorcery Points is implemented for all spell levels up to level 9 per 5e RAW (Tasha's Cauldron of Everything), and you can use Warlock Spell Slots before your other Spell Slots.
Wizard Spell Slots 5e D&D + Spellbooks Explained!
To answer such burning questions you’ll need an understanding of spell slots in D&D 5e. ... For a deeper dive into Wizard spell slots, see our article – Wizard Spell Slots 5e + Spellbooks Explained!
Multiclassing - Sage5E - sage5e.wikidot.com
As such, I'd say it's added to the spell slots you'd get from the multiclassing table, and so doesn't change the spells you can prepare due to a class.