When trying to run/install Google Python PubSub client on Raspberry Pi Debian Bullseye (version 11) released 2023-05-03, on trying to import the library I get a runtime error saying GLIBCXX_3.4.29 not found specifically in libstdc.so.6.
It seems this library is not yet updated and grpcio 1.58 does not yet support raspberian. To solve, I reverted Google Pubsub to version 2.18.1, grpcio and grpcio-status to version 1.56.2 which fixed the problem. Others facing the same issue will need to do the same.