All the issues I have with USB OTG in kernels can be simplified down to one thing by my testing: It's caused by KernelSU
Like, try rebooting phone to KSU safe mode (spam vol up and vol down buttons after the first vibration so that you don't accidentally boot into recovery or fastboot) and then check if USB OTG is working again
Alternatively, use another kernel that doesn't have KSU and then check if USB OTG works again
IF yes, the issue is caused by KSU, I don't why but it just is

Fair to say I'll stop using KSU now, since it's also EOL (for non-GKI like sweet)
I'll stick with APatch when possible, if not, Kitsune Mask it is

I have tried this with different ROMs, AOSP and MIUI, different kernels where I KNOW USB OTG is working there, and it all narrows down to the issue being caused by KernelSU

It even happens when no modules are installed in KSU! So no, definitely not caused by any module I use

Pixel Android 15 Beta 3 (64-bit only)
Ported from Pixel 8 Pro (husky)

Info:

Device brand: google
Device manufacturer: Google
Device model: Pixel 8 Pro
Device codename: husky
Device board: zuma
Android version: 15
Android API: 35
Build fingerprint: google/husky_beta/husky:15/AP31.240517.022/11948202:user/release-keys
Build type: husky_beta-user
Build tags: release-keys
Build ID: AP31.240517.022
Security patch: 2024-06-05
Raw Image Size: 5.16 GiB

Download:
SourceForge

* Same as before, then;

Fix lags for package name detection.
Spoof more identity property.
Add Unlimited Google Photos.
Add more Game Spoof; FIFA Mobile, Black Desert Mobile, Fortnite, Apex Mobile, Tower of Fantasy, Battlegrounds Mobile India (BGMI), Honor of Kings.

classes.dex is inside zip.
For use with FrameworkPatcherGO or manual edit with FrameworkPatch.

I might start modifying framework in me cooked ROMs now, If they do not pass device integrity OOTB

To be delayed since for personal reasons I'm traveling tomorrow again

But I think I know what I gotta do 😁

Okay multiple updates GO

You cannot install this module on magisk, run this command (on termux) if magisk instead
su
supolicy --live "allow system_server untrusted_app_all_devpts chr_file { read write }"

Update 3: Does not work on ROMs that modify framework like xiaomi.eu MIUI and some (not all) OSS ROMs.
Solution for them? Flash another ROM that doesn't modify framework like Lineage, stock MIUI, TRM's HyperOS ports, etc..

And finally, last and not least
If you got strong integrity via a leaked keybox, don't flex it 🫣

Okie! That is all
Until I come back home!