This looks to me like the sort of apparently insignificant measure the intellectual property brigade have sneaked into an obscure place hoping nobody would notice until it is too late.
From my layman's reading of it, requiring the transfer or access to the source code would not only be unenforceable, but illegal.
From my incomplete research only a few of the worst measures have been removed or put on hold hoping for the USA to rejoin. A few more have been mitigated to a greater or lesser extent, but almost all of the agreement is intact, including the ISDS.