Dissolve chicken bouillon cube in hot water and set aside.
Turn on a multi-functional pressure cooker (such as Instant Pot) and select Saute function. Add olive oil to the pot.
Add onion and cook for 1 minute.
Add garlic and rice and stir until each grain of rice is coated with the oil mixture. Cook until rice is slightly toasted, about 2 minutes.
Pour in white wine and simmer for about 30 seconds.
Stir in chicken broth.
Turn off Saute function. Close and lock the lid.
Select high pressure according to manufacturer's instructions; set timer for 6 minutes. Allow 5 to 10 minutes for pressure to build.
Release pressure carefully using the quick-release method according to manufacturer's instructions, about 5 minutes.
Unlock and remove the lid. Add butter; stir until risotto is creamy, about 1 minute.
Stir in Parmigiano-Reggiano cheese until melted and well combined.
Serve sprinkled with parsley.
