According to Asus BIOS download page starting at BIOS version 5862, it removes support for all Bristol Ridge APU Processors: https://www.asus.com/motherboards-components/motherboards/prime/prime-a320m-k/helpdesk_bios/ But since you have a Athlon 3000g APU Processor which is a Picasso processor...
Device Name: ASUSTeK Computer Inc. Attached: 1 Controller ID: 0x0 Vendor/Product ID: 0x0B05, 0x1866 FF Driver: n/a Device Name: ASUS Wireless Radio Control Attached: 1 Controller ID: 0x0 Vendor/Product ID: n/a FF Driver: n/a Device Name: G502 HERO Ga...
According to Asus BIOS download page starting at BIOS version 5862, it removes support for all Bristol Ridge APU Processors: https://www.asus.com/motherboards-components/motherboards/prime/prime-a320m-k/helpdesk_bios/ But since you have a Athlon 3000g APU Processor which is a Picasso processor...