@Harishv31 Thanks for your reply but this option did not work. As we need ECMASCRIPT_2020 instead of ECMASCRIPT_2019. No where I could find in the documentation that says if 2020 is supported or not

We are using AEM version 6.5.9 and our js processor config was min:gcc;languageIn=ECMASCRIPT_2018;obfuscate=true then we changed it to min:gcc;languageIn=ECMASCRIPT_2020;obfuscate=true but still it does not work. I checked the online compiler where when changed to ECMASCRIPT_2020 it started working ...