I have only read that here- that any ride will do a baby swap???
In practice only the rides with a height restriction offer baby swap and only if you have a child who isn't tall enough to ride.
Occasionally you may get a CM on a non FP or non height restricted ride that will let you baby swap by maybe waiting at the exit but that is the exception rather than the rule. Most times the CM's at rides without a height restriction won't offer it.
Otherwise you can use baby swap on any ride with a height restriiction if you have a child that doesn't meet the height. If the child meets the height and chooses not to ride then you can't use baby swap.
TJ