Whatever Adrenalin software version you're using for your RX 6500 should also work for Vega IGP. In Windows Device Manager under Display adapters do you see an entry there for Radeon Graphics or Radeon Vega Graphics? If not, the IGP may be disabled in BIOS.
From the AMD Driver page select Processors, Ryzen and then series depending on which processor you have? 2400G? 3400G? 5600G?
Ryzen R7 5700X | B550 Gaming X | 2x16GB G.Skill 3600 | Radeon RX 7900XT
Ryzen R7 5700G | B550 Gaming X | 2x8GB G.Skill 4000 | Radeon Vega 8 IGP
Ryzen R5 5600 | B550 Gaming Edge | 4x8GB G.Skill 3600 | Radeon RX 6800XT