How to change pc buttons to android?

The game is PC and Android, but on Android does not have equal PC buttons. So how to dumb to Android? (I'll separate a script for each platform.)

Mouse.KeyUp:Connect(function(key) 
if key:lower() == "w" then 
ctrl.f = 0 
elseif key:lower() == "s" then 
ctrl.b = 0 
elseif key:lower() == "a" then 
ctrl.l = 0 
elseif key:lower() == "d" then 
ctrl.r = 0 
end 
end)

-- Doubt...

For me, I do not need to open another Post now, how do I disable the other buttons and activate? For me to put while I'm flying the other keys do not work and when I'm not flying the keys stay active again?

###You should not using KeyDown or KeyUp. They are deprecated and should not be used in new work. Apart from that it's just an inconsistent way to get user input.

###Use UserInputService or ContextActionService to get user input and to make mobile compatible games.

local ContextActionService = game:GetService("ContextActionService")

local function doStuff()
    -- code
end

ContextActionService:BindAction(
    "DoStuff", -- name of action
    doStuff, -- function to bind
    true, -- create mobile button
    Enum.KeyCode.W -- keys to bind
)