For those with a similar question, I found a similar post which is more active here - https://developer.apple.com/forums/thread/649832.
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Does the equivalent path in /Library work for this? If not, you should definitely file a bug about that. Please post your bug number, just for the record. I tested this and can confirm it works, no need to disable SIP, change the boot security or mount the system files as read-write.