Thats a good question. I would try run same command, but something that may give more insightful info needed. So, below is from my lab, not sure if it would help.
Andy
Its R81.20, but version makes no difference, its linux command, so worked the same even in R55 lol
/opt/CPInstLog/install_CPUpdates_BUNDLE_R81_20_JUMBO_HF_MAIN_1.log:[2023-06-03 - 07:42:15][17603 18782]:Testing file: /opt/CPda/repository/CheckPoint#CPUpdates#All#6.0#5#4#BUNDLE_R81_20_JUMBO_HF_MAIN#14/Check_Point_R81_20_JUMBO_HF_MAIN_Bundle_T14_FULL.tgz >>> tar=yes, gzipped=yes
/opt/CPInstLog/install_CPUpdates_BUNDLE_R81_20_JUMBO_HF_MAIN_1.log:[2023-06-03 - 07:42:15][17603 18782]:About to execute command: nice -n 19 gtar --use-compress-program=pigz -xvf /opt/CPda/repository/CheckPoint#CPUpdates#All#6.0#5#4#BUNDLE_R81_20_JUMBO_HF_MAIN#14/Check_Point_R81_20_JUMBO_HF_MAIN_Bundle_T14_FULL.tgz -C /var/log/tmp/bundle_tmpdir_CheckPoint#CPUpdates#All#6.0#5#4#BUNDLE_R81_20_JUMBO_HF_MAIN#14_XAdauc
/opt/CPInstLog/install_CPUpdates_BUNDLE_R81_20_JUMBO_HF_MAIN_1.log:[2023-06-03 - 07:42:33][17603 18782]:Starting install of Check_Point_R81_20_JUMBO_HF_MAIN_Bundle_T14_FULL.tgz
grep: /opt/CPInstLog/progressFiles: Is a directory
grep: /opt/CPInstLog/registry_backup: Is a directory
grep: /opt/CPInstLog/svn: Is a directory
Also, its easy to see from web UI when it was installed, see below.