These features is coming soon in the next phase.
Our tech team is currently working on the 'Purchase Orders'.
For now the forecast is based on the sales during the timeframe that you set.
We are working to add the seasonal factor in forecast results soon.
Regarding Bundle products, we understand that you might customise a Bundle with SKUs of products A & B.
You want the reorder quantity for a Bundle product as a whole, considering inventory of two separate SKUs of different products that makes the bundle.
Sorry, as per current functionality, the app will treat each product/SKU as a separate individual product.
I think you might need to use your Bundles app for this use-case, which is available at Shopify's app store.