Magnetic locks on residential applications can have serious security/safety concerns that come with them see these related posts from a similar thread
One of the surface mounted deadbolts may work for you like the august(questionable integration with ST), or danalock(poor reviews on gen 1 gen2 coming out soon) solutions, But if your multip point patio door needs another action like mine(lifting handle up to lock top and bottom points before turning the deadbolt) then it would only provide a closed status, and sometimes… if you remember to lock the other points lock your door.