I have uploaded rc1 of pypy v7.3.2 to https://buildbot.pypy.org/pypy/ (note the trailing slash) which should be mirrored soon to https://downloads.python.org/pypy/
The hashes are here https://foss.heptapod.net/pypy/pypy.org/-/blob/branch/default/pages/download_advanced.rst#L465
The release note is here https://doc.pypy.org/en/latest/release-v7.3.2.html
This release does include a 3.7 alpha.
Please try them out, especially on windows (extra points for non-english interfaces and install paths) and macos (extra points for machines that run without homebrew stuff installed), to make sure you can run your project with them.
Any comments are welcome.
Matti