Hi Celine,
You are unable to provide your own reads for this meter type. There is generally a 48 hour delay in the data updating on the app, you should expect this to update from an estimate to actual over this time.
Looking at your other posts as you are undergoing an alteration to the meter, this is possibly why this is occurring. If this is the case, it can take 2-3 weeks for this to be fully updated, if you are still seeing estimates after this time, please reach out to the team via messenger in My Account you can also access this via the support tab in the AGL App and they can follow up on this further.