is there a way to use clay to generate a google document / slides?

you could send the values to make.com for example they have a integration to create google slides from templates and insert values for placeholders.

Fabian H. is that difficult? and is there a way to make it look nice that way?

not really difficult, and for sure you can make it look nice, as you can design the slides as normal and just have like variables for the text input on the slides. And then insert the appropiate values via API/Make.com or whatever tool

We haven't heard back from you in a bit, so we're going to go ahead and close things out here - feel free to let us know if you still need something!