I'll write a plugin later, if I'll have time.
I can show you how I did it for now, but If you're not a programmer you will struggle a lot. But, you can try.
This example below IS NOT THE RIGHT SOLUTION and a really bad practice. It does not completely cover the issue and changes core files, which must to be avoided, so make backups in case something will go wrong. It's not something I would ever recommend doing. It is done only in test purposes, I'm still learning PHP and Q2A as well.
Go to /qa-include/qa-feed.php file.
Inside foreach ($questions as $question) section, approximately on 405 line add:
$qcontent = qa_post_get_full($question['postid']);
$acontent = qa_post_get_question_answers($question['postid']);
Now, $qcontent variable contains all question data, while $acontent - holds all answers on particular question.
Then you have to comment every $lines variable and also comment this line:
//echo implode("\n", $lines);
This has to be done, because by default Q2A is printing feeds in a way Yandex Turbo will not understand. So you have to rewrite the output of qa-feed.php.
In order to debug you can print our arrays like this:
You will see everything inside those arrays and will be able to print them as Yandex expects - https://yandex.ru/dev/turbo/doc/rss/example-docpage/