I think it took a week or so for me to go from 4 to 2 meters on my account and the Gas is always the slowest to change and send it's readings.
Hopefully you won't have any signal issues like Taf neighbours do.
https://www.octopriceuk.app/tracker
You can use this site which will let you see if your data is working once you put in the API.
Also your smart meters need to be set for 1/2hr readings for smart tariffs, this you can change yourself in your account settings somewhere.