Seems like wand overrides are broken on latest Magic dev build (haven't tried latest release version) & Minecraft 1.19.4
Example: broom upgrades doesn't work

p.s: just made entire system where you can make custom bombs using slot upgrades and realized that all of this is doesn't work :(

upd: overrides itself are working, it's just wand upgrades can't "pass" them to the main wand

Strange, I will take a look- can't think of when or how that would've gotten broken.