Yes! Under RA 9225 passed in 2003, any Filipinos who lost their citizenship by naturalization in the US are allowed to have dual citizenship.
If you’re looking for this topic, I am sure you’re also interested about the rules of jus solis and jus sanguini. Filipinos born in teh US with Filipino citizen parents are considered US citizen under US jus solis rule. At the same time they are Filipino citizens under the Philippines’ jus sanguini rule.