I just tested with the Products widget and it doesn’t seem to hide the prices like the normal shop page. WooCommerce must not be using the same hooks that they use for their standard shop pages. When I get a chance I’ll see if anything can be done about those widgets, but it all depends on whether WooCommerce provides any hooks that can be used.
I haven’t tested the “Elementor Essential Addons” product grid, but I’m going to guess that they’re not using the same hooks as the standard WooCommerce pages either.