All foreign men of all ages are considered handsome by ladies in Philippines. A single lady in Philippines is looking for a man who is financially stable so he can support her and any children.
This is assumed because you are smart enough to get to Philippines and charming enough to capture her heart so foreigners start with an advantage here.
Thus a typical Philippine woman may look for a man aged 40 to 60.
The age of partner you are looking for will vary with your personality and culture. Thus we find the “right age gap” to be a number anywhere between 0 and 40 years difference. Yes, a Filipina can be too young to date a foreign man.
This is a common cultural tradition that will happen regardless of the age of the Filipina.
You can accept or say no to these requests regardless of the age gap between you and your Filipina spouse.
It seems to be epidemic in western cultures that value youth. When you date a Philippine woman, age gap is no more important than any other factor.