https://discuss.grapheneos.org/d/673-cannot-add-gadgetbridge-to-device-app-notifications/5
Cannot add Gadgetbridge to "Device & app notifications" - GrapheneOS Discussion Forum
GrapheneOS discussion forum
device appcannotaddgadgetbridgenotifications
https://gadgetbridge.org/blog/
Blog - Gadgetbridge
A free and open source Android application for bluetooth devices.
bloggadgetbridge
https://apt.izzysoft.de/fdroid/index/apk/nodomain.freeyourgadget.gadgetbridge
Gadgetbridge - IzzyOnDroid F-Droid Repository
Use your smart watch and other bluetooth devices and keep your data private!
f droidgadgetbridgeizzyondroidrepository