Hello,
01. Navigate to WooCommerce > Settings > Advanced > My account endpoints
Here you can or remove account sections (Downloads, Orders, etc.)
02. To add an “Order Query” button, this is not a default WooCommerce feature. Try to find a third party plugin to achieve this.
If you want to add custom content, Try to use the Theme’s Layout Builder, you can create Custom Layouts for WooCommerce pages like Shop, Category, Single Product page, Cart, Checkouts and thank you and my account page. You can use that to create your own custom layouts for this.
Further, you can read more about the Layout Builder here: https://xtemos.com/docs-topic/woodmart-woocommerce-layout-builder/
Best Regards,