Why do the western sanctions ignore the remote IT services that Russia provides to the Western corporations? [closed]

Since the start of the Ukrainian war Western government spent a lot of time to devise some form of sanctions to punish Russia, but many of them are not so effective. Furthermore they turn a blind eye on a business that not only is a source of revenues for the Russian Federation, but it is also a huge security threat.

Russia has a lot of firms that provide remote services and software development to western companies.This is just one example that I found with a simple search with the keywords: Russia remote service firm

Such services give Russian access to the source code used by many software systems used by Western companies and even some government organisations. Why are the Western governments ignoring the issue?