While you wait for an answer to your specific question, here are some previous answers that may be of interest to you:

u/poob1x addresses the process and timeline of Russian colonization in Siberia and the Russian Far East in as the Russian Far East colonized in a similar manner as to the American West, through the displacement of Native peoples?

u/poob1x also has a discussion of Indigenous trade between Alaska Natives and Indigenous Siberians in Why Was Asian Contact with the New World Limited Compared to Europe?

u/AllAboutRussia addresses settlement patterns and the potential for trade with the US during the 19th Century in Imperial Russia and Siberian Settlement.

Hey there,

Just to let you know, your question is fine, and we're letting it stand. However, you should be aware that questions framed as 'Why didn't X do Y' relatively often don't get an answer that meets our standards (in our experience as moderators). There are a few reasons for this. Firstly, it often can be difficult to prove the counterfactual: historians know much more about what happened than what might have happened. Secondly, 'why didn't X do Y' questions are sometimes phrased in an ahistorical way. It's worth remembering that people in the past couldn't see into the future, and they generally didn't have all the information we now have about their situations; things that look obvious now didn't necessarily look that way at the time.

If you end up not getting a response after a day or two, consider asking a new question focusing instead on why what happened did happen (rather than why what didn't happen didn't happen) - this kind of question is more likely to get a response in our experience. Hope this helps!