It appears there are currently two installation guides for 6.x on Debian, one for Bullseye and one for Bookworm:
https://github.com/linagora/linshare/blob/master/documentation/EN/installation/linshare-install-debian.md
https://github.com/linagora/linshare/blob/master/documentation/EN/installation/linshare-6.x-install-debian-12.md
A diff of the two files shows that there are some changes that might not have to do with Debian version specifics, for example the Bullseye one has updates on vhost configuration to deny access to the admin API
It appears there are currently two installation guides for 6.x on Debian, one for Bullseye and one for Bookworm:
https://github.com/linagora/linshare/blob/master/documentation/EN/installation/linshare-install-debian.md
https://github.com/linagora/linshare/blob/master/documentation/EN/installation/linshare-6.x-install-debian-12.md
A diff of the two files shows that there are some changes that might not have to do with Debian version specifics, for example the Bullseye one has updates on vhost configuration to deny access to the admin API