Go to settings-> Display->Expanded desktop. Choose on or off depending on your needs.

Hide navigation bar (Android 7.1.2) (not auto hide) from AndroidQuestions

https://m.apkpure.com/deathly-adiutor/com.exynos5420.deathlyadiutor.ads

Source: Exynos5420 Roms – Download

Source: How to flash Samsung Stock ROM using Odin

If you want to store obb files to external storage, there’s only one viable option that I found.

It’s fbind magisk module originally created by @VR25 and updated by @Hooin Kyoma. Here’s link to updated fbind module.

To use this, install termux terminal app. Type “su”. Approve root access. Type “fbind”. Type “3”.
Type “1” to move everything from Android/obb to external
Type “2” to move specific folder and then type the name of the folder you want to move.

It’s also advisable to have SD card that has “A1” or “A2” app class for better IO performance.

https://forum.xda-developers.com/t/rom-lineageos-18-1-unofficial-2-0-update-2021-01-20.4047763/page-29

https://forum.xda-developers.com/t/magisk-system-2019-1-23-fbind.3621814/page-84#post-81444075

https://github.com/LSPosed/LSPosed

https://www.thecustomdroid.com/uninstall-magisk-modules-in-twrp-recovery-guide/

https://nyaatech.com/obb-on-sdcard-android/

Source: Product database – Digital Illumination Interface Alliance

General information

External link to product

http://www.lighting.philips.co.uk/oem-emea/products/house-of-brands/xitanium-led-drivers

Testing

Technical

Hardware/firmware information

Product reference product description

The product has 2 family members Xi FP 75W 0.2-0.7A SNLDAE 230V C133 sXt and Xi FP 75W 0.3-1.0A SNLDAE 230V C133 sXt

Description

Xi FP 75W 0.3-1.0A SNLDAE 230V C133 sXt – Xitanium FULL Prog LED Xtreme drivers – Main Product: Xi FP 75W 0.5-1.5A SNLDAE 230V C133 sXt ( Product ID: 4010) Currently submitted product is a Family Product with following differences: Operating Output Power Window.

DALI parts and versions

Product properties

Source: Digital Illumination Interface Alliance