You will not be able to e-file if your wife does not have a ITIN.
You can file your tax return with the ITIN application. See How to apply for an ITIN. If you send the application with the tax return, you can file Married Joint and then you do not have to amend.
If it is possible, your wife should go to an acceptance agent in the Philippines to get her documents authenticated, This is much faster and she does not have to mail them in.
For the satndard or itemized question, just select the way you will file. If you and your spouse file separate returns and one of you itemizes deductions, the other spouse can’t use the standard deduction and should also itemize deductions.
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