After a long time, PHP Info still shows PHP version is 7.2.30
How is PHP Info supposed to read 7.4? Which php info is that, where is the file of PHPinfo located?
The PHP Info isnt going to read 7.4 because it's located at a place where it has been told to stay with 7.2. Even if the "upgrade" is successful, it won't show 7.4 until you tell the panel explicitly to have 7.4 working for PHP Info...
Paste the entire log /var/log/php-selector-rebuild.log
on this site:
pastebin.comand paste here the link you get, we would like to see your entire log to see what went wrong.