The version of Magic Earth that comes with /e/os is not the latest, subscription based version. It has not been automatically updated in /e/os for some months now, either with os updates or by App Lounge.
You could update to the subscription version, should you want to, by searching for Magic Earth in App Lounge, then applying the update. I’ve no experience of how the subscription version works in /e/os.
On the other hand, if you want to stay on the non-subscription version then you need to avoid any automatic updates such as might happen if you were to install Aurora Store. Here you’d need to make sure to blacklist Magic Earth.
There’s a lot more discussion here Magic Earth /Magic Lane . The proposed replacement map app is mentioned towards the current end of that discussion, with links.