After fine-tuning, extension uploads should work (mostly?). Please let us know if you still encounter any problems.
Our changes look promising so far. We’re still monitoring the situation closely. There might be some automatic requests, such as extension uploads not working yet, which we will adjust as soon as we encounter them.
To avoid AI crawlers from overloading our servers with hundreds of thousands of requests each day, we will try to configure a firewall in front of extensions.typo3.org. So outages and blockages for regular bots (like TYPO3 installations) are to be expected while we figure out the required configurations.