That sounds like something you could write either way (update first, update after success, update in a gray or provisional-looking way until server success or error) in any react app, depending on your needs rather than a property of this framework.
Sibling comment about Websockets perhaps more interesting explanation
If the update business logic is server-side (which it probably is if it's written in Python), there's no way the front end can update without connectivity. Anything else would imply some neat but difficult transpiling of Python to JS/webasm to make that update code available in the frontend.
Sibling comment about Websockets perhaps more interesting explanation