I have all access to the admin panel by my user, I tried to use production and developer mode, I keep seeing the options locked as the image below.
I can't click into the Use Default option, it's locked too.
How could I debug or solve it?
Most likely that system configuration was locked.
system configuration can be locked by executing the following command
bin/magento config:set <path> <value> --lock-config
This will disable the field and "use default" option.
Just remove the entry you found on the
app/etc/config.php and run
app:config:import or setup:upgrade
The command to synchronize configuration