Richard,
The solution is:
You will want to use the From block only, never the experimental block.
In fact, you should remove the Form Experimental block option by disabling and deleting the following plugin:
Gutenberg: door rocketgenius
This plugin has not been supported for many years , and the block functionality has been moved to the core plugin, so it is unnecessary.
Once removed, you may need to go through your pages and readd the forms using the Form block.
Ron