Hello,
I figured I would take a minute to provide an update on this. I have been leveraging this plugin to rewrite our native iOS and Android fishing regulation apps in a single code base, with the same application logic (huge win!). Also, with Flutter, unlike some other cross-platform frameworks, I only have to write a single UI, and (optionally) tweak platform-specific widgets, thanks to this plugin. I would also note the developers are super responsive and quick to fix any bugs. This plugin meets 90+% of my app's needs at this point. I have bundled a replica.geodatabase file for offline data access. I am adding downloading and syncing (via ImportDelta) a delta.geodatabase file. It looks like the plugin already supports this. It also looks like it supports offline .tpk and .vtpk basemaps, currently. I will be adding a bundled .vtpk shortly. Just wanted to say thank you! This is the plugin ESRI should start supporting.
Best,
Jake