If you're profile has been approved then you can able to submit proposals. But at this time your profile is set in private visibility, you have to change this into public.
Hi Muhammad Nadeem,
Your profile is currently being reviewed and you can find this information by logging in to your account. The profile approval process may take 24 hours. You will receive an email and a notification to your Upwork account once the process is complete. Thanks!
Your Provile has a hire now button so I think your profile is approved. I do not know how you can confirm from your side. May be upwork sends some notification etc.