How to send or import multiple frames to Figma Make from a Figma Design file?

It seems that it is possible to send one frame to Figma Make and it will create a new Figma Make file from that one frame. However, when multiple frames are selected (e.g. different screens of the same prototype) then the “Send to Figma Make” option disappears.

I can also see an option to Import from Figma, but the interface for this is terrible when you have thousands of Figma Design files in your enterprise and they each have multiple components within them. Worse still, it seems you cannot import a frame, only components that have been published.

Is there something I could be doing differently that would make it easier to import multiple frames from a Figma Design file into the same Figma Make file?
 

As a designer
I want to be able to import multiple frames into Figma Make
So that I have an interactive prototype of what I have designed

Given I have multiple screens designed
When I select those multiple screens
Then they are all able to be imported into Figma Make