Is there a way where we can extract the user emails signed in relation to the device OS signed with?
Detecting user OS or browser is not possible at the moment.
Google Analytics will give you a breakdown by device type, but I’m not aware of any way to tie that data to specific users. I’d also be a bit wary about trying to do that, as I’d imagine you’d be skating on very thin ice WRT to privacy regulations in many (most?) countries.
I think there won’t be an issue that we faced via this since sometimes we need to define and troubleshoot the user device issues, take for an example intercom app we are used to use it for more than 4 years and no privacy issues, but tis is only applicable with Native Apps
More ever this can be covered by the terms and conditions