presenting another nifty free Unity asset by ME! This Easy Object Pool system will get you spawning prefabs quickly using scriptable objects.
https://milkshakebattlecat.itch.io/easy-object-pool
I use it in my project for repetitive effects, requires very little setup beyond creating the SOs & assigning them for runtime creation; great for prototyping. You can request spawns at a Vector3, or send a Transform & the object will take its forward direction, making it great for projectiles.