No, @ITVAULT, do not use TWRP to flash G965FXXU7DTAA_G965FOXM7DTAC_XSG.zip. please. The file must be unzipped first. Four of five resulting files with the extension .tar.md5 are to be installed in your case by Heimdall | macOS. Please see also my user-experience Galaxy S9+ ‘star2lte’ /e/OS ‘Q’ dev AOSP Android 10