Hello @Rogelio Pérez Antonio,
welcome to this moderated Azure community forum.
The documented maximum number of organizations is indeed 200.
It's not clear if this is a hard limit, based on some technical decision in Azure. Perhaps this is a soft limit so Microsoft can change this for vary specific cases.
Please submit an Azure support request where you ask if this limitation can be changed for your situation by sharing your situation with Microsoft.
If the response helped, do "Accept Answer". If it doesn't work, please let us know the progress. All community members with similar issues will benefit by doing so. Your contribution is highly appreciated.