GNU/Linux Installing AMPAK AP6356s Driver Guide
Hi! The linked Tutorial shows you Step-by-step How to Install AMPAK AP6356s Wireless Bluetooth Driver Firmware in GNU/Linux Systems.
First, the AP6356s Wireless Module Bluetooth connection is managed by the Broadcom BCM4356a2 Chipset.
And the BCM4356a2 Devices are supported by the btbcm Kernel Module on Linux 4.15+.
But what may be easily missing is the needed Proprietary Firmware.
GNU/Linux AP6356s Bluetooth Driver Installation Guide