> By hosting on AWS/GCP, you are leaking the IP addresses to the cloud providers after all!

For hosters where the data transmission is a technical requirement, you don't need consent at all, but you need to enter a data processing agreement ("Auftragsdatenverarbeitung" in German) with the hoster and make sure that data transmission and recording is as minimal as possible (e.g. anonymize IP addresses in logs, delete logs after 2 weeks, keep data in EU cloud regions if possible).