How can I auto-deploy the bots from an assembler? Or remotely while being on a space platform?

Unfortunatly, unless another mod is used, you can't. Pretty sure the normal combat robots can't be spawn remotly as well.

That makes the robots unusable in Space Age. For example, I deploy destroyers in a hope that they will automatically clear biters and then I go to the space platform. But they just die on a second biters nests group and there is no way to launch more. What is the point then?

The idea behind the mod was to change the behaviour of the combat robots, not their spawn conditions. Since the vanilla combat robots can only be spawned by the player, this limitation also applies to the modified ones.

However, since you make a good case about them being usless unless being able to be deployed remotly, I will try to make this feature happen. Unfortunatly, I don't know if it is possible yet. I will keep you updated but can't tell you the time table yet.

You could check how the AAI's car deployment works

The issue is that the combat robots currently are spawned by capsules. So for them to be spawn via remote view, I would have to rewrite so that they are spawn as entity. This, however, requires a complete rewrite of the mod which isn't happening that quickly.