Bluetooth MIC with poor volume and quality

I have a Gigabyte DesignareEX 1.0 with Sound Chip (excellent quality using Realtek Drivers and cabled Headphone and MIC) and an internal WiFi/Bluetooth chipset. I'm trying a Bluetooth device to conduct meetings and, after had bought 3 different devices (the last a JBL Tune125BT) and an USB/Bluetooth 5.0 dongle (TPLINK UB5A), I cannot understand why the mic loads only the 16-bit 16Khz CODEC and keeps its volume too low - even being at 100% and compensated with 30dB in the Realtek driver. Conducting the Windows 11 MIC test (Settings - Sound - MIC), speaking in a loud voice register only 5%-11% v

Question by David BS on Super User, licensed CC BY-SA. We show a short excerpt and link to the original thread as credit.