LG G7 cannot be switched to LDAC as its Bluetooth Codec

[TechnoMax]

I bought an older LG G7 as my mobile music player (It is on Android 10). As I have two decent Bluetooth headphones from Sony and Shure I tried of course to pair these with LDAC.
I enabled developer options, then either in Bluetooth Audio LDAC codec "best effort" or "optimal for audio" then in Bluetooth Audio Codec "LDAC". But so far this did not work, the G7 always falls back to AAC. This gets confirmation from both the Sony and the Shure app on the phone.
But both headphones get a stable connect with LDAC as a Bluetooth codec with my tablet, a Lenovo Tab P11 Pro.

What went wrong and what could I do to get LDAC on the G7 too?

 

[TechnoMax]

This was the solution: The changes have to be made not only in the developer options but in the Bluetooth menu too:
In the Bluetooth menu I clicked the options of the connected headphone then clicked connectivity and then best sound quality. Now I can use LDAC on all my tested devices: LG G5 and G7, Samsung Tab S6 and Huawei Mate 10 with both Shure Aonic 50 and Sony WH-H900N.