When a systems entropy is at max $,$

Q$.$ Does that mean the state of disorder $/$ uncertainty is highest? $($ I.e most disordered state?$)$

Q$.$and when a systems entropy Is at max. $($ EQUILIBRIUM STATE$)$

Chemical reactions tend to reach steady state $($ where rate of forward.and reverse reaction are same?$).(($Yes or no$?$ Is my understanding correct?$))$

Q$.$ But does not mean reaction stops completely $?($ YES OR NO$)$ plz give answer and if so why $,$ reason. OR DOES IT JUST MEAN it won't $"$ PROGRESS $"$ anymore?

Q$.$what is reverse reaction in a chemical reaction does that mean that the reactants the initial reactants start get produced by a product how is that possible. Are all reactions reversible or some aren't?

Q$.$ What about fuel reactions $,$ does reverse reaction happen in it$???($ can they happen for all types of reactions? $,$ do they happen at same time in a reaction? $.$ Or does it mean simply that we can get reactants from products?

Q$.$ Do they happen at same time $?$ In the same reaction. $($ plz give example $),$ if so how do they not affect each other $.$

Burning of fuel is it a reversible or irreversible $($ does both happen same time $?).$