Following the example of many other FOSS projects, the PyPy team has
decided to move its official #pypy IRC channel from Freenode to
Libera.Chat: irc.libera.chat/pypy
The core devs will no longer be present on the Freenode channel, so we recommend to join the new channel as soon as possible.
wikimedia.org has a nice guide on how to setup your client to migrate from Freenode to Libera.Chat.