If you want to use a background image on a page created by Elementor, explain it.
This can be very easy.
Elementor edit Screen > Bottom left select “Settings”
Page Setup > Styles > images
Select the background image.
I have to paste the background image and a crispy just this.
Fine-grained settings are adjusted by position, attachment, repetition, and size in the lower part.
Commercially available background images
I often use this image of Erena.