If you're referring to the custom resourcepack logo I tested on 1.19.3 and works fine for me.
Note: I use English as game language, are you using another language by any chance? (every language should be compatible though).
If you're referring to editing just the resourcepack text and hiding the (server) text you have to use this pack.mcmeta
file and replace MyPack with your pack name. Do not remove the special ? character.
{"pack":{"pack_format":6,"description":"MyPack "}}