Hi @Marat,
Have you reached out to Collabora Online support yet? I believe I shared both the email address and the website link in our last thread:
https://forum.collaboraonline.com/t/the-problem-with-horizontal-oriented-pages-in-pdf/3810/2
There’s also a Contact Us page on the website where you can submit your query directly works just as well. Since our resources are quite limited, it can be challenging to prioritize every request. Considering connecting with the support team will be the best for you if that is urgent