Hello,
Mabye a stupid quesstion for some off you, but im new to all this coding stuff
My car (Focus MK4) was born without nav - i know that i can’t fit F9 maps into it because of memory sapce. But can you comprimise it somehow?
or is there another way i can get the navigation working?
Nope it’s not possible, replace the APIM with a larger storage or replace the chip it self with a larger storage and flash it.
Eww was hoping for a better fix 
And there is no way you can sort some countries away example france, spain etc?
Not for a non nav you barely have space for the base operating system nevermind the maps.
Also, your vehicle may have Sync 2.5, it looks like Sync 3 but has no apim. This is a new thing for Ford and makes it impossible to even do the upgrade that is mentioned above.
Post a photo of your Sync version in settings if you want confirmation