Restrict Sendle to ONE flat rate only

I have 2 flat rate methods – one for food delivery which my client takes care of and one for packages which sendle takes care of.

In settings I can only select “Flat Rate” for Sendle to track. I need it to only generate shipping orders for one of the flat rates.

Can this functionalty please be added.

My client is manually cancelling sendle orders which are being generated at the moment for the other flat rate type.