So Sébastien Ogier wont compete in all of the remaining WRC rounds.
Yes, Alpine is still valid, as only car (not RGT+, which is now usually competing in national championships). It is because FIA has changed rules for FIA passports for RGT cars. Only Alpine is...
The Alpine A110 is still good until 2027, not that it destroys your point. https://www.fia.com/system/files/documents/voiturescomplet_mai.2025.pdf
The forum being down recently may have made some think it was finished... Hopefully they'll come back as the alternatives just aren't they same, regardless of being more 'modern'.
[WRC] Acropolis Rally 2025