If you mean the version in the iodé repository, we only keep Open Camera there because on devices running iodé 2 (that are ineligible for newer builds) Open Camera was the default camera app so removing it from our repo would cause issues for those devices.
But it is true we are not updating it ourselves anymore, instead using Aperture from LineageOS as our default camera app. So if you want an updated Open Camera you can get it from the main F-Droid repo.