I developed an APP in Apache Cordova. Are there any means to upload it to F-Droid?
Indeed converting the JS code of Cordova to the APK is quite straightforward
cordova build android
For example, from my open source APP, you would only need to run to obtain the APK
git clone https://github.com/jfoclpf/in-my-district.git cd in-my-district cordova platform add android cordova build --release android