Enable developer options & experiments access in Instagram/Threads apk!
You can also just get the class, method and arg type for my Xposed module instead of patching an apk
Go to release in the project and download latest jar
Open a terminal in the same folder and:
java -jar IGExperimentsPatcher.jar -p <path to apk>
Use -x option to only show class, method and argument type to use in my Xposed module
Next you will need to sign your patched apk, you can use Uber Apk Signer if you don't want to annoy you with keys etc
java -jar uber-apk-signer.jar -a <path to apk>
In app, long press home button to show the dev options entry.