Ah I see, you are wondering why the install command did not work? I copied the file via FTP without an issue so the London file is okay now. I've just tested again to see if will update the Paris file.
root@h9combo:~# opkg install tzdata-europe --force-reinstall
Installing tzdata-europe (2023c) on root
Configuring tzdata-europe.
root@h9combo:~# ls -l /usr/share/zoneinfo/Europe/Paris
-rw-r--r-- 1 root root 0 Jul 31 2023 /usr/share/zoneinfo/Europe/Paris
Even after reboot, file shows 0 size.