How to get some Status Bar Icon item's “key” value？

[zmlu]

I want to add a custom item to Icon Blacklist, but I don't know how to get its key value.

[zacharee]

There isn't really "a way" to get the keys. They depend on your system, and may not even work. If you use the "Auto" category, SystemUI Tuner will try to suggest possible keys, but there's no guarantee they'll work.

[vaguerant]

I'm running a TCL 30 SE. The normal airplane mode key in SystemUI Tuner isn't able to block the icon, but in the Auto category, "Airplane mode" appears and is able to block the icon without issue. No key is listed, it's just labelled "Airplane mode". Does this mean the app wasn't able to identify the key?