Toddler stop drinking FM and wearing pampers

my girl is 9 n still drink fm .. i nvr stop her just change the stage (stage 5 or kids fm and fresh milk) ah but drink from a cup not bottle.. for breakfast and before going to bed. and ofc she stop diapers at 4 yr old totally.. my lil 2 yr old is at stage 3 fm n im planning potty train at 3 yr old since he can start telling us he going poo but yet to let us know he going wee wee pee