You are right. till now there are no independent onroad tests. The reason might be that till now there seem to be only prototypes in use which can only be drive by offical test drivers of Ineos. Important is that the homologation has to be fixed before the 6th of july. Because from this date on new cars have to have these assstant systems mandatory in EU:
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Driving assistance systems - mandatory from 6 July 2022
From 6 July 2022, an EU regulation will apply that makes driver assistance systems mandatory in all new vehicles: "Regulation concerning the type-approval of motor vehicles and their trailers, and of systems, components and separate technical units intended for such vehicles with regard to their general safety and the protection of the occupants and vulnerable road users".
In other words, it is about safety features that are part of the standard equipment when buying a car at an extra cost. Without these assistance systems, there is no type approval in the EU.
The reason for this regulation is, among other things, the desire for fewer traffic accidents and more safety in road traffic.
From 2022, this will initially apply to all newly developed vehicles, and from 2024, all new cars must be equipped with the additional systems.
Translated with www.DeepL.com/Translator (free version)
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for more infos look at:
https://www.tuev-nord.de/de/privatkunden/ratgeber-und-tipps/technik/fahrassistenzsysteme/ and translate if necessary
I guess that quickly after the 6th og July we will either have first onroad tests or a desaster...