Controlling my blinds via Bangle JS and scheduling when they roll up/down

The home I'm in currently has smart blinds installed.

The upstairs blinds come with a remote that allows you to roll the blind up/down, pause and switch between blind numbers or 'all'. There are also multiple remotes and there isn't 1 that works on all of them.

The downstairs blinds are slightly newer and have the same remote but also have a mobile app (tuiss) that allows you to schedule when you'd like the blinds to go up and down, as well as see battery levels etc. The app requires me to switch on my phones bluetooth, but I'd imagine the remotes send their own signal (got no experience here so guessing).

As the upstairs blinds don't allow the use of this app, I want to find a way to define and send these signals myself.

I was hoping to create a watch app, that allows me to send a signal to the blinds (regardless of which one), to raise and lower them - as well as set a schedule for them to open and close, even when the watch isn't around. Creating the watch app is fine but I'm not sure about the signal sending part or how to do this 'neatly'.

I'm assuming I will need some other component boards or something to be involved (as I'd image the older blinds don't have some bluetooth detector like the newer blinds do) but I've got no real idea where to start with something like this. So hoping some smarter people here might be able to offer some beginner guidance on where to start or videos to check out that will get me going. Ideally I'd be aiming for any other components to be discrete but I'll work with what's doable.

Also attached some photos of the blind motor things and the remote, if that is of any help. Blue blind is the newer model

Thanks in advance for any guidance people may be able to give.

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