Does the AI builder Work Only for Elementor Sites ?

The AI Builder recreates websites using the widgets in the 10Web Editor, which is based on Elementor.  You can recreate websites built with other editors, however, in order to have complete compatibility and to edit your recreated site, you will need to use the 10Web Editor. If you disable the 10Web Editor and leave only Elementor Free, you will get partial compatibility and some features may be lost.