when I create a drawing for unloading there are no tabs in the mod intermodal containers for unloading and loading, only one tab with items from this mod that allows loading

I can't seem to reproduce that error.
With Intermodal Containers I can find both of the usual tabs.
What other mods are you using?

there are no tabs from this mod, here is a screenshot of which tabs are missing https://imgur.com/a/RcpBixD

Ah I misunderstood
That dialog doesn't show recipes, only items and fluids
In order for the unloading to work you'd have to set the parameter to the item you want unloading and then if a second box appears to the right set the unloading recipe there.