In case anyone comes here looking for a solution for Wynstan blinds, I got a smart home hub (from Wynstan themselves) with the blinds and while it uses the Wynstan app, I noticed the hub is a generic brand. You can instead connect the hub up to the connector+ app which will make the hub visible in home assistant, in which connecting the connector hub to home assistant server is well documented.
Hope this helps for anyone in the future who was looking to integrate Wynstan blinds to home assistant using the smart home hub.