PHP 8.2 is already deprecated in nextcloud, so id needs to be updated. The easy way is to use php-updater.
Installing php-updater
sudo wget -O /usr/local/bin/php-updater https://global-social.net/script/php-updater
sudo chmod +x /usr/local/bin/php-updater
To update 8.2 to 8.3
php-updater 8.2 8.3
Getting the error jq-binary not found, solved by
sudo apt install jq
The maximum memory for php in nextcloud need to be changed in:
/etc/php/8.x/fpm/php.ini