While Fabrice Bellard is no longer working on TCC [0] and an official release tarball hasn't been packaged since version 0.9.27 (5 years ago) the project is by no means unmaintained.

For details, check their current working repository [1] and mailing list [2].

[0]: https://bellard.org/tcc/

[1]: https://repo.or.cz/tinycc.git

[2]: https://lists.nongnu.org/archive/html/tinycc-devel/