For URP, you may be able to automatically upgrade most of the effects, but many use custom shaders that will have to be edited/changed manually.
The Ultimate VFX Construction Kit:
Create realistic fire, smoke, lightning, raging storms, shockwaves, and more!!
NOTE: SRPs (URP, HDRP, etc.) are not supported. This asset works with the built-in pipeline.
Suitable for both 2D and 3D games.
While containing a MASSIVE number of effects unique ONLY to this package, Ultimate VFX also includes…
Action VFX
Storm VFX
Particle Plexus
Particle Force Fields
Also featuring:
▲ 300+ Prefabs – a massive collection of unique Shuriken particle system prefabs with varying levels of layered complexity to create amazing visual effects.
▲ 200+ (over 600MB) of Textures – want to create your own ultra high quality effects for next-gen platforms and resolutions? Dive into this monstrous arsenal of sprites and spritesheets and make your own!
▲ XP Titles – a new, experimental expansion with prefabs suitable for title screens, game menus, credit rolls, etc.
▲ MIR-2II Shader Pack – most of the particle effects included use the default Unity particle shaders. Sometimes, that’s not good enough. Ultimate VFX ships with several additional shaders to drive your visual design above and beyond with distortion, intersect highlighting, masking, and more.
Original_Link: https://assetstore.unity.com/packages/vfx/particles/ultimate-vfx-26701
