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There is no legal restriction against applying for and obtaining a visitor’s visa. She may apply for the visitor (B1/B2) visa. When applying for your B1/B2 visa, it’s important for her to establish that she plans to stay for only a temporary period of time; has binding ties to the Philippines, and can afford to pay for her expenses during her U.S. trip.
By presenting as much evidence as possible, she can successfully obtain a visitor visa despite having a pending I-130 petition.
So yes, it is possible, but sometimes difficult.
Remember ,she must make sure to disclose the visa petition that is pending, prepare to prove that she has significant reasons to return after her trip, such as a job, family, and property. She will have the burden of proving that she does not have immigrant intent.
I hope this helps and clarifies.
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