Hi Jack,
I hope you are well today and thank you for your question.
If you are using parallax widget then you can achieve this by using custom plugin solution shared in the following topic.
https://colorlibsupport.com/t/cusomizing-parallax-widget/
This plugin deletes the existing parallax widget and adds new parallax widget having extra functionality so please read the new parallax widget in the Homepage widget area and configure it.
Best Regards,
Movin