Bro.
Directly Fiverr URL are not allow for facebook Ads Campaign or Boosting.
So, You can try using UTM Builder to do adverting.
Last time i saw one ads on Instagram.
I hope you are understand.
Thanks
Digital Marketing process is same for Local and International clients, So you just need to manage them with some tips and tricks and must good work. Explore some day about fiverr then you can understand all. Its me Sharif