Hello everyone, I was wondering if there is a way to fill questions with the participant attributes, thank you so much!

Yes, this is doable. For text questions use the default answer feature and placeholders like
{TOKEN:ATTRIBUTE_1}
{TOKEN:ATTRIBUTE_2}
...

If you want to apply this to other question types, please provide more details. In such cases you'd have to use an equation question to populate the target question from a token attribute.