Yes, that is one very reasonable approach. There are other approaches, but the “grab everything from redux” approach makes sense. It’s hard to be sure without knowing more specifics, but based on what you’re saying, that sounds like a good bet.
It’s been a while since I’ve done something like that (I’ve been spoiled by Redux Saga) but I you can just grab the state crap off redux store in mstp. You can even create a selector to grab and transform that into a convenient object so you can put that logic elsewhere. Or not.