As shown in screenshot, nothing is appearing when searching for items .. Seems to be a forge only bug as this does not happen in 1.18.1 fabric. I've searched numerous items, nothing pops up. even with no search text in the field

Tried it out and while I did find some problems, the search still worked most of the time.
As such, I suspect that I'm not getting the same problem that you're getting, and that there is some sort of error happening during the search, or while constructing the caches.
@itsdinkd Can you look through your logs and see if there's any errors/exceptions/stack traces that might be related to your problem?

Can't confirm in 1.19.4 and since no comment was given this can be closed.