[Xiaomi Poco F3 / Xiaomi Mi 11X / Redmi K40] Sauceunny:
Thanks for both the fix and returning to IMMENSITY! IMMENSITY has been my primary kernel for a while so hopefully I can offer some informed comparisons while trialling N0Kernel again.

Like the other times, flashed successfully on ArrowOS 11.0 using TWRP 3.5.2. Was greeted by this pop-up, however; may require your v1.3 fix again. Everything seems to be working properly otherwise; opened all apps with no issues (e.g. no 'zoom' bug that is present with other kernels) and charged from 97% to 100% with normal temperatures afterwards (currently at 20°C and 99% after 27 minutes standby).

Will edit this post with updates as I trial N0Kernel as a daily driver. Especially interested to see how the battery life compares with IMMENSITY!

20/1 update (v1.5):

Maintained 99% battery overnight on aeroplane mode which is promising. IMMENSITY has had one instance of maintaining 79% but 3% drain is normally expected.

Battery is currently at 76% with 2h58m SOT (20h total); includes 25m of gaming and light usage otherwise. Adaptive 60/90 Hz refresh rate was trialled for the majority of screen time (see last point for details).

Battery temperatures while active seem to be very similar to IMMENSITY, with N0Kernel possibly having a slightly better SOT drain

90 Hz refresh rate, while a welcome addition, seems to have similar issues as noted in v11.4 and v11.5 of Optimus Drunk kernel. Specifically, colour saturation becomes 'washed out' when 90 Hz is active, e.g. dark greys becoming lighter. Forcing either 60 or 120 Hz only avoids this from occurring; an adaptive 60/120 Hz rate still has instances of 90 Hz. @EmanuelCN, would there be any kernel-side adjustments possible or might 90 Hz simply be incompatible with the display hardware?

21/1 update (v1.5/1.6):

Drained from 58% to 54% overnight on aeroplane mode which is more or less identical to IMMENSITY; however, it feels like standby drain with data and Wi-Fi on is slightly better

Before flashing v1.6, battery was at 23% with 7h40m SOT (46h total); included 2h50m of gaming and light usage otherwise. Full 120 Hz refresh rate was used after yesterday's update with only a minor impact on SOT drain.

Curious to note that according to the usage stats, 'Android System' was pinned as having used 44% battery (would normally average 6% on IMMENSITY for the same time); however, I did not observe any unusual drains or temperatures throughout the cycle

Confirmed that the message pop-up is fixed in v1.6. Battery temperature is also normal 19 minutes after full charge (currently at 22°C).

22/1 update (v1.6/1.7):

Maintained 95% battery overnight on aeroplane mode which is another favourable result

Confirmed removal of 90 Hz refresh rate in v1.7 and that 60/120 Hz functions as normal

A (very) minor thing to note is that when booting into TWRP, there is a slight delay before inputs are able to be registered. Of all the kernels that I have tried, only IMMENSITY does not have this delay.

Based on the fixes/updates and my experience so far, I believe that this kernel is an overall improvement over IMMENSITY. Will be using N0Kernel as my primary kernel for the foreseeable future!

25/1 update (v1.8):

Continues to have better battery life and temperatures than stock ArrowOS; used latest stock kernel for about a day after clean install

Unfortunately, the ArrowOS update EDIT: Was actually N0Kernel 1.8 (1.7 works normally) has reintroduced the zoom bug to N0Kernel. IMMENSITY remains fully compatible in this regard.

27/1 update (v1.7):

Drained from 63% to 58% overnight on aeroplane mode which is higher than IMMENSITY; dropped to 57% fairly quickly after reactivating data, etc. EDIT: Could be a result of WhatsApp's daily backup which I started recently; a local backup was created at 02:00 and uploaded at 07:00.

Re. the ArrowOS/N0Kernel 1.8 bug, may it possibly be related to the defconfig change? I am not a developer by any means; just noticed that defconfig was a common factor between 1.8 and the commit identified in this post.

29/1 update (v1.7):

Drained from 41% to 39% overnight on aeroplane mode with automatic WhatsApp backup disabled; a good result in the lower battery range

On IMMENSITY, thermal profiles other than default generally lead to slightly-higher drains with no noticeable increases in performance (e.g. 'Browser' for Firefox). This remains largely the same on N0Kernel.

Android System continues to have a large presence in the battery stats with no observable effects; currently at 38% over 41h runtime

7/2 update (v1.9):

Zoom bug still present with ArrowOS

Apps seem to load faster and with less time between transitions