Being a modpack maker and editing recipes on the go in json files sometimes human errors can occur like thinking a item name is written like something else.

A quick way to verify this would be copying and pasting the entire id like givemehats:strider_hat into JEI search bar, and allowing it to show a item if it exists and matches the format. A feature currently in REI, I was hoping this would be possible to add into JEI.

Thanks for the suggestion!

I have changed JEI's resourceId search mode to resourceLocation, so now you can enable this in JEI's client config:
ResourceLocationSearchMode = "ENABLED"
and search the way you'd like:

Thanks for the suggestion!

I have changed JEI's resourceId search mode to resourceLocation, so now you can enable this in JEI's client config: ResourceLocationSearchMode = "ENABLED" and search the way you'd like:

Which config file do I enter this in?

Found it. when i put in ResourceLocationSearchMode = "ENABLED" it automatically gets deleted after saving lol

There was an issue with my build system recently, so the fixed version might not have been published when you tried this out.
Please try again with the latest version on CurseForge from today, and let me know how it goes!