So the first error i missed was :
Jan 01 23:25:39 ``yunhost.org`` yunohost-portal-api[9806]: RuntimeError: OpenSSL 3.0's legacy provider failed to load. This is a fatal error by default, but cryptography supports running without legacy algorithms by setting the environment variable CRYPTOGRAPHY_OPENSSL_NO_LEGACY. If you did not expect this error, you have likely made a mistake with your OpenSSL configuration.
since import failed, any other import will display ‘ImportError: PyO3 modules compiled for CPython 3.8 or older may only be initialized once per interpreter process'
origin of problem was a armhf package for openssl-provider-legacy
ii openssl 3.5.4-1~deb13u1+rpt1 arm64 Secure Sockets Layer toolkit - cryptographic utility
ii openssl-provider-legacy:armhf 3.5.4-1~deb13u1+rpt1 armhf Secure Sockets Layer toolkit - cryptographic utility
removing it did reinstall the right arm64 openssl-provider-legacy
once fixed it works.
I guess this is related to usage of archive.raspberrypi.com as debian repository for my raspberry pi3 B+.