We have a greenlist of about 1000 controls which we know are good. cordova-plugin-background-geolocation isn’t on that list, so it’s blocked.
It appears to be rarely used (about 100 downloads a week). It was last updated 5 years ago, which makes it very old.
You might see if there is a more up to date plugin that works for you. The author, ZenCity, even recommends using another plugin Cordova-Background-Geolocation - but that one is not currently listed in npmjs.
Let us know if you can find something more modern which will work for you.