Hänen kaikki rahansa varastettiin.

English Translation

He was robbed of all his money.

to steal /= to rob
to steal - secretly
to rob - forcefully

so maybe:
Hänen kaikki rahansa rosvottiin. or
Kaikki hänen rahansa ryöstettiin.
I’m not sure.

Although I agree that there is a difference between rob and steal, I think “to be robbed of” can be used in a wider sense. Mind you, you can’t say “he was stolen of all his money”.

Your suggestions look fine to me, a non-native.