Also das klappte super
und hier habe ich am Schluss
update-alternatives --config php-cgi
kann ich bloss 8.1 auswählen
update-alternatives --config php-fpm.sock
kann ich bloss 8.1 Auswählen
bei update-alternatives --config php
konnte ich 8.2 auswählen
und ganz am Schluss
# a2enconf php8.2-fpm
ERROR: Conf php8.2-fpm does not exist!

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und hier habe ich am Schluss

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update-alternatives --config php-cgi
kann ich bloss 8.1 auswählen
update-alternatives --config php-fpm.sock
kann ich bloss 8.1 Auswählen
bei update-alternatives --config php
konnte ich 8.2 auswählen
und ganz am Schluss
# a2enconf php8.2-fpm
ERROR: Conf php8.2-fpm does not exist!