Hi Rose
Thank you very much. That worked. At first, it failed, but I realised that I had to install the additional free plugin found on the first site, Essential Addons for Elementor, onto the second site, before importing, since I was using Advanced Tabs (vertical) in that free plugin.
But yes, that works much better than WordPress Import/Export.
Maybe in future, 8theme will include a third-party plugin like Ultimate Addons for Elementor with XStore, as you had something similar for WPBakery. I believe cross-site copy & paste is made even easier and there are a host of other useful elements.
Regards
Robert