Stable Android 11 Download is available after its release since 8th September 2020. Since then we have seen many Android 11 based ROMs such as LineageOS 18, Pixel Experience 11, RevengeOS 4.0, StatiXOS 4.0 etc. for various devices.
Custom ROMs usually do not have GApps or Google proprietary apps built-in. So, developers provide Google Apps separately in recovery flashable zip format.
This page provides Android 11 NikGApps download packages.
Latest update: 23rd September 2020
Changelog (16th Sept '20) - Added Pixel Launcher (can be found in macro/stock/full package) (Yay? :P) - Fixed Google Chrome account sync/sign in issue - Fixed Google Markup crash - Removed unnecessary Google Dialer overlays
Note: - There is only one known issue that is related to sms permission which is a Rom side issue. The system needs to ungrant sms permissions of gms in order for gapps to regrant it. Workaround to this issue is to manually deny and then allow sms permissions to gms. - Google Restore requires sms permissions to be fixed so choose 'Don't restore' when you're in setup wizard and later after allowing sms permission manually, run setup wizard again to restore your backup.