Russians are not the russian government…
It’s been known since ever that onlyoffice has russian developers, I don’t see what is the problem.
OnlyOffice on your desktop does not snitch your data to remote servers afaik unlike Google and Microsoft products.
You all miss out on the fact it litterly says the russian product is a fork:
In 2019, the key products of the company were the OnlyOffice office package and its fork P7-Office.