You cannot legitimately view someone else’s Instagram password.
To check your own Instagram password, use the password manager on your device or browser if it was saved there.
On iPhone, check saved passwords in Settings > Passwords.
On Android, check saved passwords in Google Password Manager.
In Chrome, check saved passwords in Settings > Password Manager.
In Safari, check saved passwords in Settings > Passwords or Safari settings.
If you forgot your Instagram password, use the Instagram login screen and tap Forgot password?
Reset your password through the email or phone number linked to your account.
If you think your account was hacked, change your password immediately and review account security settings.
If you no longer have access to your email or phone number, use Instagram’s account recovery options.