Hi,
We currently don’t 100% support Elementor - while you can add HivePress blocks via Elementor, advanced features are not available yet. I highly recommend using the core WordPress block editor to keep the website fast and lightweight. But we plan to add support in future updates. Also, please check these docs: How to customize pages - HivePress Help Center
How to customize templates - HivePress Help Center
I hope this is helpful to you.