Hello Isabelle Dionisius
This will require Custom Work. I have found a way. Please go to components/com_sppagebuilder/assets/js/sppagebuilder.js and search for revealAnimationDelay You will find 2 occurences. On the first occurence change
this.revealAnimationDelay = 1500
to this
this.revealAnimationDelay = 6000
Then check the differences. Here default 1500 will make the text wait for 1.5 seconds. If you set it to 6000, then it will wait for 6 seconds. So, change the value according to your need.
Important: Everytime, SP Page Builder is updated, the file will be replaced. So, please keep your file saved with you. After update, change it again.
Best regards