Hi @qqqqqq@kipanya and welcome to our adorable Community 😊 These in-game challenges and events are not always available to everyone. Sometimes they are just a part of testing so it might happen that they just disappear and come back again. You can read more about this on the link below.
I want to use this opportunity to redirect you to a post made by my friend and a fellow Superstar @Elsa where you can read everything you need to know about Candy Crush Saga section. Please follow the link below.
Thank you for your understanding. We have a great team of helpers around the Community so please feel free to ask if you need help with anything. Have a wonderful day 🤗