Hi ... I don't work for LS but thought I'd see if I can help
ioncube hasn't been released for PHP 8.2 as yet, the latest supported version is only 8.1 - you can track the latest supported releases at
https://www.ioncube.com/loaders.php
I've checked and lsphp81-ioncube is in the repo so make sure you have done an apt update before you do the apt-get install
ie
$ apt update
$ apt install lsphp81-ioncube
lsphp81-ioncube/bullseye,now 12.0.5-1+bullseye amd64 [installed]
PHP extension for interfacing with ioncube
As for php-json ... I believe that PHP8.x now includes JSON as standard so you don't need to install it as an additional module
You'll see from this simple check that it is included as a module in 7.4 but no module is required with v8
root@web-1:~# php -i | grep -i json
/etc/php/7.4/cli/conf.d/20-json.ini,
json
json support => enabled
root@web-1:~# /usr/local/lsws/lsphp81/bin/lsphp -i | grep json
json
json support => enabled
Available serializers => php, json, igbinary
Jon