WI: Luzon and Palawan remains Bruneian

I was thinking what if Lakandula did not ally with the Spanish and the Bruneians were able to send reinforcements or Bruneians were strong enough to maintain their Empire for a longer time and were able to retain Luzon and Palawan, how would the Bruneians treat Luzon and Palawan...would they trade with the Japanese.
 
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