we do not offer Facebook ads as part of our plugins. You can extend Felgo applications with custom C++ and native code to implement it yourself though. Felgo is based on Qt and fully compatible, there are several tutorials how you can extend Qt with such custom code.
Out of curiosity, why are you specifically interested in Facebook ads? We are in the final stages of adding rewarded videos and so called “native ads” to the AdMob plugin, which will be updated soon, if that would be interesting to you as well.