Yesterday i understand the mobile score is higher if you wrote only text on top of your site (like in your mars. demo template)
(First content paint;screenshot of your site near score)
Add some texts and change responsive options – show/hide on mobile; easy solution.
Playing with elementor cache options and using jetpack cache; everyone can have high scores with this theme.
Menu cache (you can find a few topic in. the forum) and 2-3 options are making trouble with jetpack cache but at last after 1 week i can now get 70-80 score on mobile.
Thank you.