As mentioned in the GPT-4 and GPT-4 Turbo Preview model availability page, GPT 4 is Available to subscriptions with current access to the model version in the region.
when I created an instance in the US-East region, I found the GPT-4 model to be available there.
I understand that you are able to create model in EAST US region. No specific settings needed to create the models. However in some regions capacity is limited, This is the case in Japan East at this time.
Please try with the available regions in the meantime.
Hope this helps.