Hi @Søren Holmriis ,
Welcome to the Q&A Forums.
I've not attempted to use this column type before with PowerApps so I can only link to a post from a well-known community member who noted several years ago that this particular column as yet isn't compatible with Power Apps. I think this is to do with the data type utilising the Bing API but I can't comment experientially on that sadly.
https://rezadorrani.com/index.php/2018/12/04/location-columns-for-sharepoint-online-lists-libraries/