Hello @danicasati,
I am sorry to now that Smush did not work for you as expected on your end.
To begin with, the troubleshooting process, if you have Smush controls on the Network Admin, kindly ensure that the lazy loading feature is turned on.
Additionally, if you have allowed sub-site controls turned on, kindly check on the sub-site dashboard to ensure that you have not over-ridden the lazy loading settings from the sub-site admin.
Also, if you find that it is active in all the above conditions, kindly help us with the site URL to test this further and analyze the problem.
I’m looking forward to hearing from you on it.
Regards,
Prathamesh Palve