That right icon with the pole and the one bar would suggest that. Also, I would guess, you would have some delay in the application as well, as the data unable to pass through from the meter to the server, or with low bandwidth, so you might see there days of delays.
But, the house icon suggests that the communication with the IHD must have been activated. Very likely that the meter received the command and activated the HAN, but the server did not receive the confirmation from it or something similar.
To be honest, these devices are officially certified measuring equipment, there shouldn’t be any issue with the firmware. For an operator, if it is unable to control it, it is easier just to replace it than deal with any troubleshooting. I don’t know what was the story about the botched firmware, but I guess when the technician came to check it, they just replaced the unit, very likely with a model which has an LTE connection to avoid the noisy PLC.
The concept of trying to activate the HAN multiple times basically would push the system to send activation commands, until it receives the confirmation from the meter.
I would start to monitor when the bars next to the pole signs has 2 or 3 bars and that time start to activate the HAN from the website/app.
Also, knowing other meters, the display must be able to show actual RSSI or LQI values when you scroll through the options, maybe verify there first what are those values.
Otherwise the post from Elektroda is quite old, from 2020 but people seem to resort to it. Even years later.
And Tauron is quite ahead of any of the DSOs in the subject. This article from NES (the manufacturer of the meters used by Tauron) says that Tauron installed 350000 AMIPlus meters between 2014 and 2017! (Started 10 years ago!!!) You have mentioned that your meter was out of legal validity and they replaced it. These meters usually certified for 10 years, your picture has 2016 written on it, so I would guess they just replaced it farly on time.