Hi Sabine
I have no clue about the delivery times (nor the availability) for Starlink hardware - but it would probably neither be Vodafone nor Starlink that delivers the hardware to your door .. both will most likely rely on a (local) shipping company to deliver their hardware to your door.
As I recall[1], your router should use a DSL line - so as @KitsuneNoBaka wrote, a LTE cell connection might be faster/better than the DSL line .. but that depends on the coverage/distance/topology/?? at your place and is something that would need to be tested. :-/
[1]: From your post about How do I set up a DSL connection to the router using an RJ45 cable on QubesOS 4.3.1? - #21 by WhiteShadow