Can you check on Appearance > Elements if you have any Layout element active?
If so, can you check all of their “Disable elements” tab and check if any of them have “Footer” ticked like this? https://share.getcloudapp.com/BluxwowK
If yes, make sure to untick it so the footer doesn’t get disabled. 🙂
Elementor Pro has an option to override the theme’s default parts with its own layout template.
You may have to check if Elementor has a template assigned for the footer on its Templates > Theme Builder > Footer option and check if it’s empty or if a setting is disabling it.